Bryan R. Cullen, PhD

• Professor of Molecular Genetics and Microbiology
• James B. Duke Distinguished Professor of Molecular Genetics and Microbiology
• Director, Center for Virology
• Professor in Medicine
• Member of the Duke Cancer Institute

https://medicine.duke.edu/faculty/bryan-r-cullen-phd

The majority of patients reported with C4 deficiency have been children or adolescents muscle relaxant drug test generic 50 mg imuran with amex. C2 deficiency is the most common complement deficiency muscle relaxant shot for back pain order discount imuran online, shown to be associated with a variety of diseases muscle relaxant drugs z buy generic imuran 50 mg line, but deficient individuals are often entirely healthy muscle spasms 7 little words buy 50 mg imuran amex. Transient maculopapular rashes have been reported to occur in association with infections in patients with C3 deficiency; histologically muscle relaxant withdrawal symptoms cheap 50 mg imuran overnight delivery, these have shown the features of leukocytoclastic vasculitis. Clinically, this manifests as angio-oedema, typically affecting the bowel mucosa, face or extremities, and, most seriously, laryngeal oedema, which may be life threatening. Deficiency of factor 1, previously termed C3b inactivator, leads to unchecked cleavage of C3, and therefore to clinical manifestations closely resembling those seen in C3deficient individuals. In this condition, plasma infusions may provoke anaphylaxis, because the contained C3 is so rapidly cleaved to form the anaphylotoxin, C3a. Primary immunodeficiency diseases: an update on the classification from the International Union of Immunological Societies Expert Committee for Primary Immunodeficiency. Clinically, it may occur on diseased skin (international classification term: pruritus on inflamed skin; example: atopic eczema) or nondiseased, normallooking skin (classification term: pruritus on noninflamed skin; replaces the previous designation pruritus sine materia). This is similar to a point prevalence in a previous study in an urban population (Oslo: 18 747 participants) in which 8. These data were confirmed by a study of working age population (11 730 participants) which reported a point prevalence of 16. Retrospective studies in Copenhagen, London and France found that pruritus occurred in 2. Introduction and general description During the past decades, pruritus research has improved our understanding of the neurobiology of this symptom [3], and led to the development of new itch classifications, questionnaires and guidelines [2,4]. In systemic sclerosis, pruritus severity is independently associated with severe sleep disturbance [8]. Polycythaemia vera associated aquagenic pruritus leads to reduced global health status and higher fatigue levels [9]. According to another study, acute pruritus is more highly prevalent in individuals with darker skin types. Interestingly, a European study showed that healthy male immigrants from East Asia, the Middle East and North Africa had significantly more frequently acute pruritus (pruritus during the past week at the interview) than Norwegians and immigrants from western countries [20]. The difference between acute and chronic pruritus in skin type still has to be resolved. However, it was shown that after capsaicin application, African Americans had a lower rate of hypersensitivity towards pain than East Asians, Hispanics and Caucasians, suggesting a different sensitivity towards sensory symptoms [21]. Systemic diseases Metabolic and endocrine diseases Hepatobiliary diseases with 80­100 or without cholestasis including Primary biliary cirrhosis Hepatitis C virus infection Chronic kidney disease Anorexia Diabetes mellitus Hyperthyroidism 25­70 15 10­77 58 2. As long as interdisciplinary, national or international registries are not available, all such analyses are likely to be confounded by a patient selection bias. Neurological diseases Brachioradial pruritus Notalgia paraesthetica Postherpetic neuralgia Psychiatric or Depression psychosomatic diseases Modified from [4,227­231]. Pathophysiology Cutaneous induction of itch Cutaneous sensory nerve fibres are involved in the pathophysiology of cutaneous itch. For decades, itch was considered as a weak pain signal transmitted by pain nerve fibres. In 1997, unmyelinated, mechanoinsensitive C fibres specialized for the transmission of histamineinduced itch but not pain, were identified [29]. In 2007, other nerve fibre classes were demonstrated to be involved in the transmission of itch [30]. It has been shown that Sex Chronic pruritus occurs almost equally in women and men (women: 54. Itch was more recently demonstrated to be routed by mechanosensitive C fibres and thinly myelinated A fibres, both classical pain fibre classes [30,32]. Studies have demonstrated that the proteinase cowhage can activate mechano sensitive, nonhistaminergic C fibres and A fibres thereby inducing itch. C fibres and A fibres may transmit two distinct qualities of itch, a slow burning component and a faster pricking component, respectively [33]. This may explain the differing sensations described by patients which accompany itch. The most frequently reported qualities associated with itch are burning and stinging, but prickling, warmth and cold sensations are also described. In addition, in various diseases, the cutaneous neuroanatomy is diseased and contributes to symptom induction and maintenance. It is currently assumed that spinal cord pain neurons and their interneurons control itch neurons and thereby contribute to the relief of itch by scratching. It was shown that spinal interneurons expressing the atonalrelated transcription factor Bhlhb5 inhibit the itch pathways within the dorsal horn; furthermore, it was shown that they are most probably under the control of pain neurons [38,41]. Current magnetic resonance studies suggest that there is no specific itch matrix in the brain but a broad overlapping of itch activation maps with pain areas [38]. These afferents could be activated by transepidermal electrical nerve stimulation (used therapeutically to allay itching) [44], by vibration, or more simply by scratching. Alternatively, scratching could simply damage sensory nerve endings, repair occupying several minutes. Why some itches evoke scratching and excoriation (as in scabies) whereas others prompt rubbing (as in lichen planus and urticaria) is unknown. Scratching has been ingeniously utilized as an indirect objective method of quantifying itch and as such has been utilized in the evaluation of treatment of itching [45,46]. Sensitization is defined as the increased responses of primary sensory neurons to itch and pain mediators. In the skin, hyperplasia of sensory neurons and reduced threshold Scratching Scratching is a reflex functioning at a spinal level, although modified greatly by higher centres. Since the sensation of itching is reinforced by facilitating circuits in the relay synapses of the spinal cord, the prolonged scratchinduced relief could be due to temporary suppression of these circuits [43]. Similarly, central sensitization is based on spontaneous activity of superficial dorsal horn neurons, enhancement of mechanically evoked responses and their increased response to mediators [33]. However, all data concerning central sensitization have been obtained in animal studies and their extrapolation to humans needs to be justified by investigations yet to be carried out. Elevated tissue fluid levels of histamine in lesional skin of chronic urticaria have been demonstrated [56]. The recognition that histamine is a mediator of itch in urticaria and can be abated by H1 antihistamines, has led to these drugs being used indiscriminately for the treatment of pruritus in other conditions where there is little or no evidence that histamine is involved. The paucity of effective alternative antipruritics encourages this widespread practice. Mediators of itching in skin diseases Itching in skin does not invariably involve participation of mediators. There is no evidence of participation of mediators in the itch of senescent skin or xerosis. However, itch is the dominant symptom of inflammatory skin diseases, and in these dermatoses mediators of itch are assumed to play a central role. Data on identification and characterization of mediators of itch in skin has been obtained from several sources. Intradermal injection into mouse skin enables the frequency, duration and intensity of scratching to be measured. Mediators can also be directly identified and measured in tissue fluid from diseased skin by skin perfusion or microdialysis technology. Acetylcholine Acetylcholine, a neurotransmitter in the autonomic nervous system, acts on both muscarinic and nicotinic receptors. Intradermal injection of acetylcholine, causes pain in healthy subjects, but evokes itch in atopic individuals [57]. Since tissue levels of acetylcholine are reported to be elevated in atopic eczema patients [58], it is possible that this mediator plays a role in the pruritus of atopic eczema. Botulinum toxin type A is known to inhibit the release of acetylcholine and was shown to suppress histamineinduced pruritus experimentally [59] and in notalgia paraesthetica [60]. Afferent neuron terminals enjoy close proximity to dermal mast cells consistent with presumed cross­talk between these structures [63]. Opioid peptides Opioid peptides are classified into three groups: endorphins, enkephalins and dynorphins, and their receptors are also classified into three types:, and. The pruritic action of morphine and other opioids involves the opioid receptor and is antagonized by naloxone or naltrexone. Opioids can cause pruritus by central mechanisms, due to imbalance between and opioid receptor activation [69]. Significant tissue levels of opioid peptides are found in human skin in cholestasis, a condition in which plasma levels of opioid peptides are elevated; cholestatic pruritus is ameliorated by the opioid receptor antagonist naloxone [70­72]. Nalfurafine, a opioid receptor agonist, also reduces uraemic itch significantly and was licensed in Japan for this indication in 2009 [73]. It causes pronounced itching if injected superficially intracutaneously but pain if it is injected more deeply into the dermis. Recently, the spotlight has shifted to histamine H4 receptors which appear to cause pruritus by direct action on a variety of immune and inflammatory cells, including mast cells and T helper 2 (Th2) lymphocytes in atopic eczema [52,53]. Therapeutically useful H4 receptor antagonists may be available in the future [54]. The main source of histamine in inflamed skin is the dermal mast cell, supplemented by infiltrating basophil leucocytes. In urticaria and in insect bite reactions these cells release histamine (and other mediators) via an energy dependent signal transduction cascade triggered by specific antigen (or in chronic urticaria by an autoantibody) crosslinking of the high affinity immunoglobulin E (IgE) recep- Pruritus 83. In order to obtain a comprehensive patient history, standardized questionnaires are recommended [93]. Intensive and longlasting pruritus can lead to considerable psychological impairment. The attending doctor should not underestimate the negative psychological effects that pruritus can have on a patient. It is important that this issue is specifically addressed by the physician when taking the history. Neurotrophins Neurotrophins are neuropeptides which regulate growth and function of neurons. Cytokines: interleukin 2, interleukin 31 There is increasing recognition of a functional interaction between the nervous system and the immune system. Accordingly, patients may present with excoriations, papules, nodules, lichenification, scars, and hyper and hypopigmentation resulting from scratching. If these are predominant (classification term: pruritus along with chronic scratch lesions), they may conceal an initial dermatosis. They used spicules of cowhage (Mucuna pruriens) which contain mucunain, a cysteine protease, which was more pruritic than histamine when inserted into human skin. It is likely that this receptor plays a central role in atopic pruritus, and explains the disappointing response to antihistamines. Mrgprs consist of over 50 members, in which MrgprAs, MrgprB4­5, MrgprC11 and MrgprD are involved in histamineindependent itch [33]. The proteinase cathepsin E is an endogenous itch inducer via the production of endothelin 1 in the epidermis [78]. Endothelin 1 is produced by mast cells, endothelial cells and keratinocytes in the skin and is a potent pruritogen which can elicit scratching upon cutaneous injection [33]. Indirect evidence suggests endorphin is also involved in the itch of atopic eczema skin. These are not clinical entities by themselves but reaction patterns resulting from chronic scratching. Clinical variants Pruritus in inflamed skin (dermatoses) the majority of dermatoses may induce pruritus, although itch occurs with interindividual variation. While all patients with atopic eczema and urticaria report itch, other diseases such as pityriasis rubra pilaris or lupus erythematosus show itch only in a subset of patients. Intense widespread pruritus is also a major feature of Sézary syndrome and occurs in cutaneous mastocytosis if the skin is rubbed to provoke a weal (Darier sign). Itch in atopic eczema (atopic itch) and psoriasis vulgaris (psoriatic itch) have been investigated in great detail and current studies aim at showing the antipruritic effect of new targeted therapies in these entities. Pruritus of atopic eczema the itch of atopic eczema is aggravated by scratch damage, which causes enhanced inflammation (itch­scratch cycle) (see also Chapter 41). Itching is usually worse at night, and is aggravated by contact with wool, by sweating, and by the ingestion of spicy foods and alcohol. The itch of atopic eczema is multifactorial, and is due to dryness (almost invariable in atopic eczema sufferers), inflammation, hyperplasia of skin nerves and probably to disturbed regulation of itch traffic in the central nervous system. In this context, alloknesis (itchy skin) forms a major component of the itch suffered by the atopic eczema patient, explaining, for example, the paroxysms of itching experienced by patients in response to sweating, sudden changes of temperature, humidity, undressing or dressing, etc. These multiple and distinct mechanisms may explain seemingly conflicting views on the nature and causation of pruritus in atopic eczema. Pruritus in atopic eczema involves pruritoceptive, neurogenic and probably psychogenic, mechanisms. Several studies, reviewed by Rajka [96], have reported an enhanced and abnormally prolonged response to application of pruritic pharmacological stimuli in unaffected skin in atopic patients. Studies of the itching response of atopic eczema patients to histamine iontophoresis suggest a decreased response of afferent cutaneous fibres to high doses, but an increased sensitivity to low concentrations; possibly because of increased permeability of clinically normallooking skin of these atopic patients [97]. There is also an increased population density of sensory nerve fibres in the affected skin [98], although this is probably nonspecific. It is important to distinguish itching associated with inflammatory changes or chronic lichenification from that simply due to excessive drying of the skin in patients with atopic eczema. Emollients, which should always be prescribed, and which in many cases may be all that is required, will be inadequate alone where inflammatory changes are responsible for the itching. Recent dermal microdialysis studies have demonstrated the involvement of mast cell mediators other than histamine in lesional skin of atopic eczema patients [99].

Small series in adults and children have found extracutaneous features in 21­27% of patients [294 muscle relaxant liquid form 50 mg imuran buy with mastercard,295] kidney spasms no pain 50 mg imuran purchase visa. In these earlier studies muscle relaxant anticholinergic discount 50 mg imuran free shipping, mild degrees of frequently asymptomatic oesophageal dysmotility were identified in 17­23% of cases spasms in spanish purchase cheap imuran on-line, as well as mild gas transfer defects and restrictive changes in lung function in 14­18% [295 muscle spasms xanax buy on line imuran,296] and myositis in up to 34% [294,295]. Electrocardiogram abnormalities, particularly incomplete right bundle branch block have been documented in adults and children with varying frequencies (8­88%) [19,297­299]. In one study of 40 asymptomatic children with morphoea, 16 (40%) had echocardiographic abnormalities, particularly involving the mitral valve and left ventricle [297]. The frequent occurrence of extracutaneous manifestations has now been confirmed in larger studies. In contrast, the linear subtype was associated with neurological (31%) and ophthalmological (8%) complications related to the affected site on the face or scalp [9]. In this study, symptoms of arthritis were the most common, encountered in 11%, particularly in children with linear disease and rheumatoid factor positivity. Arthritis was unrelated to the site of the morphoea in a quarter of cases, suggesting that a systemic, rather than a local, inflammatory process is involved. Six per cent of children had an oligoarthritis (up to four joints) and 5% a polyarthritis more than four joints); 30% of the children with arthritis had a positive rheumatoid factor. There is also some evidence that patients with extracutaneous manifestations, particularly children [19], appear to have more severe disease, as suggested by greater levels of systemic inflammation and a greater need for systemic immunosuppression. Interestingly, the presence of a positive rheumatoid factor may be associated with more severe articular involvement. Functional limitation is defined as a clinically appreciable limited range of motion of a joint secondary to contracture or to skin and subcutaneous tissue involvement, but not due to abnormality Table 57. Early inflammatory phase Granuloma annulare Early extragenital lichen sclerosus Lyme disease­ erythema migrans Mycosis fungoides Cutaneous mastocytosis Radiation dermatitis Fixed drug eruption Sclerotic phase Necrobiosis lipoidica Pretibial myxoedema Hyperpigmented phase Postinflammatory hyperpigmentation Actinic lichen planus Café au lait macule Atrophic phase Lipodystrophy Steroidinduced atrophy Lupus profundus Acrodermatitis chronica atrophicans Panniculitis (late stage) Clinical features 57. In a third of cases neurological changes were unrelated to the site of skin involvement. These findings are similar to those of a systematic review of neurological involvement in 224 published cases of linear morphoea in which seizures (42%) and headache (19%) predominated, but cranial nerve palsies, hemiparesis and neuropsychiatric involvement were also documented [300,301]. Both ipsilateral and contralateral bone thinning, cerebral atrophy, white matter lesions, focal subcortical calcifications and meningocortical changes have been described [301]. Scalp and calvarial abnormalities such as atrophy, T2 hyperintensities, calcifications and ipsilateral cerebral atrophy are the most commonly reported [154]. In one study of 16 patients these included malocclusion (94%), an overgrowth tendency of the anterior lower third of the face (82%), abnormal mastication (69%), dental anomalies (63%), skeletal asymmetry (56%), bone involvement (50%) and temporomandibular joint involvement (19%) [302]. Enophthalmos [277], choroidal and retinal folding, hyperopia, retinal vasculitis, glaucoma and third nerve palsies are also documented [276]. Nine of the children with Raynaud phenomenon had more than one extracutaneous manifestation, including arthritis, gastro oesophageal reflux and cardiac arrhythmia. Symptomatic gastrooesophageal reflux, confirmed on appropriate investigations, was identified in 1. As with the Raynaud phenomenon, approximately 60% of these children had other concomitant extracutaneous features. Four per cent of children had more than one extracutaneous manifestation and again this occurred predominantly in patients with linear disease. Together these findings suggest a more widespread inflammatory and/or autoimmune process in some forms of morphoea, as well as a need for more systematic multiorgan baseline investigations. Psychological morbidity was highest in patients with generalized morphoea and eosinophilic fasciitis, and in those with more severe disease, greater levels of pain and fatigue and a greater impact of disease on daily life and social support [309]. The second study, in 277 adults and children, confirmed that reductions in quality of life correlated with functional impairment and symptoms of active disease such as pain and pruritus, independently of disease subtype, age and sex [282]. Disease course and prognosis Early studies indicated that the duration of disease activity, although variable, was usually 3­5 years [35], with plaques generally resolving earlier than other subtypes. However, mean disease duration of childhoodonset morphoea may be twice as long as that for adultonset disease (13. There is now increasing evidence to suggest that in certain types of morphoea permanent remission is not the rule. In a retrospective study of 113 adults and 126 children referred over a 20year period to 2001, children with mixed forms of disease were more likely to run a more protracted and complicated course, and relapse was more frequent in generalized, deep and mixed forms [22]. In a retrospective chart review of 52 paediatric patients with linear morphoea seen between 1990 and 2010, although disease stabilized after a mean duration of 5. Reactivation of disease was frequent, even after seemingly effective courses of methotrexate and corticosteroids, such that 31% of patients reported active disease after 10 years [23]. The most recently published retrospective chart review includes 344 patients of whom 119 had a childhood onset of disease. Disease recurrence occurred in 27% of the paediatriconset group and 17% of the adultonset group. The linear limb variant was associated with a higher risk of recurrence, irrespective of age at the onset of disease [310]. The longterm impact of paediatriconset morphea was further highlighted in a group of 27 adult patients (mean age 30. Overall, 81% had persistent symptoms of pain, itch or numbness; 89% of patients had persistent disease activity, continuous in 8/27, and with a remitting­relapsing course in 16/27. Seven of 27 (29%) patients described flares of activity triggered by trauma, pregnancy or reduction or discontinuation of systemic therapy. Fifteen of 20 patients with linear disease had permanent sequelae including reduced range of motion and deep atrophy. These studies highlight the need for careful counselling of patients and their families and continued vigilance. Concomitant morphoea, particularly plaque and nodular forms, have been reported in up to 6. Patients with childhoodonset disease, although they have a higher degree of disease related damage, may experience less of an impact on their quality of life [308]. Investigations the diagnosis of morphoea is largely clinical, but a number of investigations can be helpful in guiding management (Table 57. A biopsy can be undertaken if the diagnosis, the depth of involvement or the degree of activity are in doubt. An incisional ellipse through the violaceous/inflammatory edge of a lesion, into the sclerotic centre and extending down into the subcutis, should be taken and the site clearly indicated for the pathologist. If the depth of involvement is in question the biopsy should extend into the fascia and underlying muscle and referral to a plastics or general surgeon may be required. Are there extracutaneous manifestations (headache, migraine, seizures, arthralgia, myalgia,dyspepsia, Raynaud phenomenon, etc. Serial ultrasonography can be used to evaluate skin thickness and loss of muscle and fat [316]. Disease activity can be correlated with echogenicity and tissue blood flow measured by Doppler [317] and laser Doppler [318,319], ultrasound techniques [317,320] and infrared thermography [321]. A durometer is a handheld instrument that measures the depth of skin indentation after the application of a standardized amount of force. Durometry measures skin hardness, a recognized surrogate for skin thickness [322], and has been shown to objectively discriminate affected versus unaffected skin on the trunk and limbs in children with morphoea [323]. Eosinophilia, hypergammaglobulinaemia and raised inflammatory markers may occur in active disease of any subtype, but are more frequent in generalized and linear forms, particularly if there is deep involvement. Increased levels of creatine kinase and aldolase have been associated with the development of new lesions, muscle atrophy and limb shortening, and may thus suggest muscle involvement and possibly disease activity [30]. Frequently associated autoimmune diseases such as autoimmune thyroid disease should be excluded. Defining outcome measures in morphoea has proved difficult because morbidity is caused by a combination of cutaneous and subcutaneous damage as well as disease activity. Trying to find accurate measures of disease activity has been a particular challenge. It has shown high specificity and sensitivity for assessing disease activity [317]. The most accurate sonographic signs of activity are increased subcutaneous echogenicity and increased cutaneous blood flow. Laser Doppler imaging measures blood flow within the dermis and is a more accurate reflection of skin inflammation than infrared thermography, which is difficult to interpret when there is soft tissue atrophy. Scanning laser Doppler imaging had a positive predictive value of 87% and negative predictive value of 94% in a small study evaluating its use in assessing activity and predicting progression [319]. Clinical scoring techniques have the advantage of not requiring expensive or cumbersome equipment. Disease damage was defined as irreversible or persistent changes of the lesion due to previous active disease or complications of therapy. The cutaneous manifestations include hyper/ hypopigmentation and subcutaneous and dermal atrophy. It is hoped that it will prove a useful tool for assessing clinical changes in routine patient care and outcomes in clinical trials. Management the management of morphoea has been challenging because of a lack of standardized evaluation methods and of evidencebased treatments. Linear and generalized forms of morphoea can lead to permanent cosmetic and functional impairment. However, treatment of patients with significant damage but inactive disease exposes them to the potential side effects of the medications, without providing significant benefit. Treatment choices should be based on the subtype of morphoea, the level of disease activity and, to some degree, on the age of the patient. In practice however, this has not always been the case and the treatment prescribed may depend more on the specialty of the treating physician than the patient or their type of disease. Thus, from a total of 531 prescriptions for 224 patients (95 children), dermatologists prescribed topical corticosteroids in 41%, other topical treatment in 25% and phototherapy in 16% of cases, and systemic corticosteroids in 5% and methotrexate in 4% of cases. Rheumatologists, in contrast, prescribed methotrexate in 34% and systemic corticosteroids in 31% of cases, and topical treatments in 10% and phototherapy in only 2% [34]. In this study, 68% of patients with linear morphoea received topical corticosteroids as the mainstay of treatment if they saw a dermatologist (4% received methotrexate), whereas 39% of linear morphoea patients seen by rheumatologists received methotrexate and 8% topical corticosteroids [34]. There was a wide range of responses: methotrexate with corticosteroids was the most frequent response (37. These surveys underscore the need for a joined up multidisciplinary approach to establish effective treatment guidelines and to ensure that patients are not undertreated. The initial evaluation of a patient with morphoea should include an assessment of the type, extent and activity of disease (see Table 57. Treatment can then be based on the subtype, activity, extent and depth of disease, and patient symptoms [2,25,26]. Case reports and a prospective openlabel study in 13 patients initially suggested a role for topical tacrolimus 0. Two small placebocontrolled trials support the use of twice daily topical tacrolimus 0. The latter was also found to be safe and beneficial when used 3­7 times weekly, over a 9 month period, in 21 adult and paediatric patients in two prospective openlabel studies [328,336]. Benefit in prospective but uncontrolled studies has been shown for twicedaily application of topical vitamin D analogues (calcipotriol/calcipotriene 0. Although there is no direct evidence to support their use, topical and intralesional corticosteroids are frequently used [330] with good effects, particularly in the early inflammatory stages of disease or if there are pronounced epidermal changes. Although a variety of treatment doses and regimens have been employed, there is consensus that lowdose (10­20 J/cm2), Part 4: Inflammatory Management 57. Early inflammatory and sclerotic lesions appear to respond most favourably, and cases with deep involvement least favourably. Outcome measures recorded in over 90% of cases include variable combinations of clinical examination, skin scores, ultrasound measurement of skin thickness, cutometer measurements and skin biopsies. The duration of responses is variable and up to half of the patients may develop recurrence of active morphoea lesions at 2­3 years [351]. Nevertheless, lowdose therapy may still have a role, particularly if combined with topical modalities such as vitamin D analogues [339]. In patients with progressive disease despite topical agents and/or phototherapy, and in patients with linear, deep or disseminated forms of disease such as morphoea en coup de sabre, pansclerotic morphoea or eosinophilic fasciitis, systemic therapy is indicated. There is broad agreement that combinations of pulsed intravenous and/or oral steroids with methotrexate should be used first line. An open study of 17 patients with severe morphoea (linear/ generalized) found that oral corticosteroids (0. Systemic corticosteroids should be considered in patients with severe, active inflammatory disease and in patients with eosinophilic fasciitis who appear particularly steroid responsive [253]. Methotrexate is a cornerstone of morphoea management [363­ 365,366,367,368,369,370). Furthermore, mast cell numbers and levels of tenascin ­ an extracellular matrix protein previously shown to be increased in the skin and circulation of morphoea patients [376,377] ­ are both reduced in lesional skin after methotrexate therapy [378]. Two early uncontrolled case series (17 patients, 9 adults) suggested some improvement in skin lesions with methotrexate alone [262,363]. Four retrospective reviews documented the response to methotrexate alone in 52 cases, and in combination with corticosteroids in 67 cases [365,366,379,380]. Improvement was described in 79% of cases but was more variable in those treated with methotrexate alone. In three prospective studies, a total of 60 patients (15 adults) were treated with either monthly pulsed intravenous (1 g, 3 days per month, for 6 months in the adults and 30 mg/kg, 3 days per month, for 3 months in nine children) or daily oral corticosteroids (2 mg/kg/day (maximum dose 60 mg/day), tapered to 0. A 50% reduction in skin scores, corroborated by biopsy and ultrasound measurements, was documented in 13/15 adults after a mean treatment duration of 9. This benefit was confirmed in a randomized placebocontrolled trial in 70 children with active linear, generalized or mixed morphoea, comparing 12 months of oral methotrexate (15 mg/m2/week (maximum dose 20 mg/week), n = 46) with placebo (n = 24) [367]. All patients received a concomitant 3month course of oral prednisolone (1 mg/kg/day (maximum dose 50 mg)). Response was assessed objectively with infrared thermography, a computerized skin scoring system, by physician global assessment of disease severity and the development of new lesions. Methotrexate was well tolerated, and resulted in a reduction in new lesion formation, which occurred in 6.

The vascular endothelial damage is thought to be mediated by circulating immune complexes [29] muscle relaxant valium buy imuran line. Deposition of IgG and IgM and C3 within and around the vessel wall and at the dermal­epidermal junction is a common feature [1 muscle relaxant otc meds 50 mg imuran buy free shipping,10 spasms of the heart discount imuran,14] spasms under rib cage purchase imuran australia. Hypocomplementaemia in urticarial vasculitis is consistent with complement activation via the classical complement pathway caused spasms everywhere generic 50 mg imuran with amex, presumably, by circulating immune complexes [16,29]. A spectrum of autoantibodies has been observed in urticarial vasculitis including antinuclear antibodies, extractable nuclear antigens [17], antiphospholipid [24] and antiendothelial antibodies [30]. The pathogenic importance of these observations is unclear and further research may elucidate their clinical relevance. Mast cell activation is thought to occur early in the formation of vasculitic lesions [28] this is associated with the release of the pro inflammatory cytokine tumour necrosis factor [28]. The mechanisms of activation and damage of endothelial cells in urticarial vasculitis are poorly understood. Microscopically, endothelial cell involvement is characterized by swelling and necrosis [5,32]. Endothelial cell activation is reflected by upregulation of cell adhesion molecules [3,28]. In vasculitis, endothelial cell activation is known to result in the loss of anticoagulant and fibrinolytic properties, thereby leading to fibrin deposition and fibrinoid degeneration of the affected vessels [33]. Also, activation of endothelial cells contributes to the recruitment of inflammatory cells into the perivascular infiltrate. Unresolved questions remain as to whether this activation is caused by antiendothelial antibodies, complement activation or transmigration of inflammatory cells. In serial biopsies from a patient with exercise induced urticarial vasculitis, eosinophils were the first cells recruited at 3 h, followed by neutrophil predominance at 24 h [28]. Histological studies have shown extracellular deposition of eosinophil peroxidase and neutrophil elastase [28]. Lymphocytes are thought to be the predominant cells in the perivascular infiltrate in the lesions older than 48 h [2,34]. The true relevance of lymphocytic infiltration to the vasculitic process needs to be clarified further [35]. Pathology Classical histopathological features of fully developed urticarial vasculitis are: (i) endothelial cell damage and swelling and loss of integrity of the vessel wall; (ii) fibrin deposits in the affected postcapillary venules; (iii) neutrophilpredominant perivascular infiltrate with leucocytoclasis; and (iv) erythrocyte extravasation [5,36,37]. However, all of these features may not be present, thereby causing diagnostic uncertainty. Furthermore, the wellrecognized continuum of histological changes between urticaria and urticarial vasculitis [36,38,39] may contribute to uncertainty over diagnosis. Immunoglobulin G, IgM and/or C3 within or around the vessels of lesions is seen more often in patients with hypocomplementaemic than normocomplementaemic urticarial vasculitis [10]. Immunoglobulin deposits can also be detected at the dermal­epidermal junction [14]. Some authors argue that 70% of patients with immunoglobulin deposition at the dermal­epidermal junction develop glomerulonephritis [40]. Lymphocytic predominance in perivascular infiltration is often seen in skin biopsy specimens from lesions older than 48 h [2,34]. Lymphocytic vasculitis is not a common feature in urticarial vasculitis [35] and the histological diagnosis in these cases should be based on the histological evidence of vessel damage with fibrinoid degeneration [5]. Presentation In some patients, weals in urticarial vasculitis are indistinguishable from those in chronic urticaria. Recent evidence suggests that urticarial vasculitis may be an underlying process in 20% of patients with clinical presentations of chronic urticaria resistant to treatment with antihistamines [8]. In addition to weals, other cutaneous signs in urticarial vasculitis may include livedo reticularis, Raynaud phenomenon and very occasionally bullous lesions [5,6,29]. Joint involvement is common; usually arthralgia and joint stiffness and, rarely, arthritis or synovitis [6,9,29]. Patients with hypocomplementaemic urticarial vasculitis may present with gastrointestinal features including nausea, vomiting, abdominal pain, intestinal bleeding or diarrhoea [29]. Some patients develop transient or persistent microscopic haematuria and proteinuria [10]. Pulmonary symptoms may include cough, dyspnoea or haemoptysis [44] and occasionally the development of chronic obstructive pulmonary disease. Leucocytoclastic vasculitis has been detected on lung biopsy in these patients [16]. Other clinical presentations may include adenopathy, splenomegaly or hepatomegaly [6]. Rare neurological (pseudotumour cerebri, optic nerve atrophy) or ocular (episcleritis, uveitis, scleritis, conjunctivitis) manifestations may occur [16]. Of interest, a few case reports suggested a distinct association of cardiac valvulopathy, Jaccoud arthropathy with hypocomplementaemic urticarial vasculitis [45]. Environmental factors Potential causes include drugs, infections and physical factors. Drugs implicated in the development of urticarial vasculitis include cimetidine, diltiazem, procarbazine, potassium iodine, fluoxetine, procainamide, cimetidine and etanercept [5,6,16]. Rarely, the disease is caused by physical factors such as exercise and exposure to sun or cold [16]. Clinical features History In some cases, infection or drug intake may precede the onset of urticarial vasculitis. Patients often complain about fatigue, malaise or fever associated with weals [6]. Clinical variants Hypocomplementaemic disease tends to be more severe than normocomplementaemic disease [24]. It remains unclear whether there is a transition between these clinical variants over time [2]. Therefore, serial testing of serum complement levels over time is important for distinction between normocomplementaemic and hypocomplementaemic urticarial vasculitis. Hypocomplementaemic urticarial vasculitis syndrome is a distinct clinical syndrome identified in about 5% of patients with urticarial vasculitis [2] with the following diagnostic criteria: (i) biopsyproven vasculitis; (ii) arthralgia or arthritis; (iii) uveitis or episcleritis; (iv) recurrent abdominal pain; (v) glomerulonephritis; and (vi) decreased C1q or presence of antiC1q autoantibodies [24]. Differential diagnosis In clinical practice, it may sometimes be difficult to differentiate lesions of urticarial vasculitis from urticaria when some of the characteristic histopathological features of vasculitis are not present in the skin biopsy [36]. The continuum of histological changes between urticaria and urticarial vasculitis has been well recognized and confirmed by a series of patients with intermediate histological features [36]. This suggests that there may not be a clearcut histological distinction between these two conditions. Therefore, the concept of minimal diagnostic histological criteria for urticarial vasculitis has been introduced [5]. The difficulties in differential diagnosis between urticaria and urticarial vasculitis experienced by clinicians and histopathologists reflect an existing gap in our knowledge of skin pathology in these two conditions and warrants further research. The detection of some histopathological features of urticarial vasculitis may be difficult due to the limitations of the existing methodologies. For example, endothelial damage is better assessed by electron microscopy and may be challenging to detect on routine histology. The representation of affected vessels in skin biopsy depends on the focal plane of the section through the vessel [46]. Thus, careful examination of several sections from the same biopsy specimen may help to identify the affected vessels. Further development of diagnostic approaches may enhance the accuracy of the diagnosis of urticarial vasculitis in difficult cases. Prognosis in urticarial vasculitis depends on the presence of systemic involvement. Systemic involvement may occur early on although lateonset complications have been described. In some cases, urticarial vasculitis may precede the onset of haematological or connective tissue disorders. Several skin biopsies may be required for the confirmation of the diagnosis of urticarial vasculitis [5]. All patients with urticarial vasculitis should undergo a laboratory workup consisting of full blood count, blood biochemistry and erythrocyte sedimentation rate. Urinalysis and liver function tests are essential in laboratory workup for systemic involvement. In the case of abnormal urinalysis, 24h urine protein and creatinine clearance should be checked. Antibody screen in patients with urticarial vasculitis should include antinuclear antibodies, antibodies against extractable nuclear antigens, rheumatoid factor and circulating immune complexes. For example, suspicion of pulmonary involvement should trigger a workup including chest Xray and lung function testing. Classification of severity Severity of urticarial vasculitis varies from mild to life-threatening; there is no established consensus on the severity grading. Patients with severe urticarial vasculitis present with hypocomplementaemia, systemic involvement or treatment refractory disease. Complications and comorbidities Patients with urticarial vasculitis may present with renal involvement (microscopic haematuria or proteinuria) at disease onset or later in the disease course but it rarely progresses to renal failure. Patients with urticarial vasculitis, who have deposits of immunoglobulins or complement at the dermal­epidermal junction on direct immunofluorescence, are more likely to develop glomerulonephritis [39]. Chronic obstructive pulmonary disease is considered as a life threatening late complication of urticarial vasculitis [2]. Connective tissue diseases and haematological malignancies are common comorbidities in urticarial vasculitis [6] (see disease associations later). In some patients, urticarial vasculitis can be the first presentation of these diseases while in others urticarial vasculitis can present in the context of these diseases. Chronic viral infections (hepatitis B and C) are other important comorbidities in urticarial vasculitis. Management Management of urticarial vasculitis is mostly based on case reports, small patient series and a few openlabel, noncontrolled Table 44. Patients with normocomplementaemic urticarial vasculitis limited to the skin tend to have a benign disease with a good prognosis. Conversely, hypocomplementaemic urticarial vasculitis is associated with a more severe course and more frequent systemic involvement [2]. Lesional skin biopsy (diagnostic) Full blood count Erythrocyte sedimentation rate Biochemical profile C3, C4 complement components (serial testing) Antinuclear antibodies Antiextractable nuclear antigens Hepatitis B and C serology Circulating immune complexes Urinalysis Key references 44. In unresponsive patients, corticosteroids (prednisolone at doses of 40 mg/day or more) can then be considered for shortterm management [5,6,44]. For severe refractory cases, immunosuppressive agents (cyclophosphamide, azathioprine, etc. Other approaches such as intravenous immunoglobulins, methotrexate, intramuscular gold and plasmapheresis have also been used [48­51]. Recently, several biological therapies have shown promise for urticarial vasculitis in anecdotal reports or small series. A case of normocomplementaemic urticarial vasculitis showing a partial response to omalizumab (antiIgE) has recently been reported [54]. Integration of biological agents into the management protocol for urticarial vasculitis in the future may help overcome the issue of toxicity associated with the use of conventional treatments for urticarial vasculitis, especially longterm oral corticosteroids. The choice of treatment should take comorbidities and disease associations into account. For example, patients with urticarial vasculitis with systemic lupus erythematosus may respond to dapsone [16]. Stratification of patients in terms of systemic involvement and prognosis may facilitate more targeted and individualized treatment approaches in the future. At present, there is a strong need for doubleblind placebo controlled studies to evaluate the efficacy of conventional and novel therapeutic approaches to urticarial vasculitis. This may be achievable by collaborative multicentre and multidisciplinary efforts given the rarity and complexity of this disease. From a clinical perspective, a consensus on the management of urticarial vasculitis is much needed and would harmonize the treatment approaches to this rare condition. Hypocomplementemic urticarial vasculitis syndrome: an interdisciplinary challenge. Cellular and molecular dynamics in exercise induced urticarial vasculitis lesions. First line treatments n Nonsedating H1 antihistamines Nonsteroidal anti inflammatory drugs Second line treatments Dapsone Colchicine Hydroxychloroquine Short trials of corticosteroids Third line treatments h Azathioprine Ciclosporin Mycophenolate mofetil Methotrexate Intravenous immunoglobulins Cyclophosphamide Cutaneous clinical features may include urticarial reactions, oedema, erysipelaslike lesions, pustulosis and pyoderma gangrenosum. There is also an increasing number of complex polygenic inflammatory disorders in which abnormalities of the innate immune system play an important role. In those autoinflammatory syndromes which present with an urticarial or maculopapular rash, the primary lesion is a red or pink macule or a slightly raised plaque. However, on biopsy a neutrophilic perivascular and interstitial infiltrate of the dermis is present, without vasculitis or significant oedema. For all the genetic autoinflammatory syndromes and related complex disorders, diagnosis is suspected on clinical or clinico- pathological grounds and confirmed by more specific analyses. Skin biopsy is almost always indicated and demonstrates the nature of the inflammatory infiltrate. Serum amyloid A levels are also increased and this is predictive of an increased risk of amyloidosis, the major complication of many autoinflammatory syndromes. Genetic diagnosis is often the next step and will be guided by the clinical context. Other investigations will depend on the specific disorder, as for example hearing tests in the cryopyrinopathies. Inflammatory flares can occur in many organs, especially the skin, joints, eyes and serous membranes. An underlying genetic abnormality predisposes the affected individual to activation of the innate immune system and an exaggerated inflammatory response to exogenous or endogenous triggers.

Depression may affect the skin in several ways: · Skin disease may lead to a loss of selfesteem and so to depression muscle relaxant in india order imuran line. Clinicians need to be able to make a clear distinction between appropriate sadness in response to life events and a clinical depression muscle relaxant wiki 50 mg imuran order free shipping. This is not to say that appropriate sadness should be dismissed or not addressed (for example spasms colon safe 50 mg imuran, by suggesting opportunities for bereavement counselling or other support where suitable) muscle relaxant 2 buy cheap imuran 50 mg on line. Plus three or more of the following: 3 More than 5% weight loss in a month or persistent increase or decrease in appetitite muscle relaxants yahoo answers buy imuran 50 mg line. This is a chronic state of depression that may not be severe enough to meet the criteria for major depression. A depressed mood must be present for most of the day on most days for at least 2 years. The patient must not have gone more than 2 months without experiencing at least two of the following symptoms: 1 Poor appetite or overeating. Patients with chronic forms of depression are at risk of subsequent major depression, considerable social disability and unhealthy lifestyle choices such as poor diet, alcohol abuse and smoking. Depression in the elderly may be more manifested by irritability, selfneglect, somatic complaints or forgetfulness than conventional symptoms. In children, depression may be insidious and present as disruptive behaviour, irritability, truancy or somatic complaints [4]. A number of robust screening instruments [5] have been developed and validated to detect depression. One and twoquestion screening tools have the merit of speed but a high false positivity. Suicide refers to a range of selfdestructive behaviours ranging from nonlethal acts, which have been called suicidal gestures, attempted suicide, parasuicide and more recently selfinjury, to a lethal action in which a patient dies, defined as a completed suicide. The rate is rising in young men, particularly in those with behavioural disturbance, substance misuse (25%) and persistent psychosocial difficulties. Suicide is an essential feature of depressive disease and 15% of patients with major depression kill themselves. Psychiatric disorders are the main risk factors but numerous studies have also identified physical illness as an important contributory factor. Chronic illness is a risk factor in suicidal ideation and 50% of patients who attempt suicide have a physical illness, especially chronic debility and pain [2]. Not surprisingly, disfiguring chronic dermatoses have been shown to put patients at risk. In a study of 217 patients with psoriasis [3], 10% of patients reported a death Part 7: Psychological, sensory & neurological 86. The severity of the psoriasis was reflected in the frequency of suicidal ideation and the level of measureable clinical depression. Suicidal ideation was found in seven of 11 patients with Darier disease related to the disfigurement, intractability, social exclusion and smell of the dermatosis [5]. Unfortunately, some dermatological patients become so unhappy that they commit suicide successfully. A group of 16 patients ­ seven males and nine females ­ who committed suicide successfully after presenting with dermatological problems to two dermatologists working in the same skin department, have been described [6]. Acne scarring can have just as profound an effect, or even a more profound effect, on body image, selfesteem and confidence as inflammatory acne. The positive therapeutic role of isotretinoin in the management of moderate to severe acne has been described for many years [8], and this may need to be borne in mind when considering the more recently reported association of suicidal ideation in patients treated with isotretinoin. Controversy remains over the relationship between isotretinoin and suicidal thoughts, so it is important for the prescriber to monitor suicidal ideas and refer highrisk patients to the mental health services. Where possible, and where there is a high risk of suicide, the acute mental health team will encourage the patient to be admitted voluntarily, if necessary. In these circumstances it is somewhat unusual that a patient will be admitted against his or her will via the national mental health acts. Shortly after the introduction of oral isotretinoin there were isolated case reports of mood change and depression. Large doses of vitamin A have wellrecognized toxic effects including fatigue, confusion, headache and diplopia. Reported psychological effects include aggression, personality changes, poor concentration, tearfulness, depression, ruminations of guilt and psychosis. These neuropsychological adverse effects have been suggested as a general model for retinoid side effects. The relationship between the drug and depressive illness was made more acute by reports of suicide in isolated rare cases. Some case reports have described depression developing during treatment, some with resolution during the discontinuation of the drug ­ socalled positive dechallenge ­ and a few with the recurrence of symptoms on rechallenging with the drug. In addition, there have been descriptions of an increase in frequency and/or severity with increased dosage, simulating a dose­response relationship. A recent study reported a rise in the risk of attempted suicide in patients both on treatment and after treatment with isotretinoin (incidence ratio 1. However, the risk of attempted suicide had been increasing before the treatment was started, so it could not be established whether the increased risk during and after treatment was because of the isotretinoin. A systematic literature search for studies reporting primary data on depression and suicidal behaviour in patients treated with isotretinoin for acne could only analyse nine studies that met the inclusion criteria out of 214 studies examined [3]. A period prevalence of 11% was found in a 4month treatment period in one study and a monthly prevalence of 4% in another [2]. These rates are assessment of risk Dermatologists are not always accustomed to asking patients about their intentions for selfharm. However when a depressed patient has confided their distress, it is essential that they should be asked about suicidal thoughts. Dermatologists should be aware of the risk factors for suicide: · Prior suicide attempts. Physical treatments now most often refer to medication, but also include some other infrequently used modalities, such as electroconvulsive therapy, light box treatment and even psychosurgery. Psychological treatments cover a wide range of interventions, including anxiety management techniques, cognitive behavioural therapies and psychoanalytical therapies. The treatment of psychiatric conditions also often involves social interventions, such as attention to housing, occupational or educational interventions and arranging appropriate access to benefits or resources. The synthesis of the three approaches is often termed the biopsychosocial approach. Some dermatologists are beginning to become increasingly familiar with psychopharmacological interventions and also recommending talk therapies. The rise of psychodermatology as a subspecialty has seen more dermatologists experienced and trained in basic psychiatric and psychological interventions (albeit under the supervision of trained psychiatrists and psychologists). Explain that antidepressants work by increasing the levels of certain brain chemicals and that this takes a while so there will be no immediate therapeutic effect. Antidepressant effects can be evident at 1 week, and by 2­3 weeks at therapeutic dose an effect is often seen. If there is minimal effect, consider increasing the dose after 3­4 weeks, but if there is no response at all after 3­4 weeks consider changing to another agent. Side effects, however, can be more immediate, for example the sedative and appetite increasing side effect of mirtazapine. Explain that they are not but they can have a discontinuation syndrome in which if the antidepressant is stopped suddenly the patient may experience flulike symptoms and odd electric shock sensations. These symptoms disappear on restarting the antidepressant, which should then be withdrawn gradually. Antidepressants with a shorter halflife, for example paroxetine, are particularly prone to have a discontinuation syndrome, whereas fluoxetine with its long halflife is much less likely to manifest this problem. In other controlled studies, low selfesteem and measurable depression were improved by therapy with isotretinoin. Before and after comparisons of mood changes in matched groups of patients receiving either antibiotics or isotretinoin showed no difference in mood change. There still remains enough doubt about the validity of a relationship between isotretinoin and mood changes to suggest that clinicians need specifically to enquire about depression at each out patient visit. Most national dermatology associations have produced guidelines to assess this risk of mood change in patients on isotretinoin. Similarly, regularly assessing patients for suicide before, during and after treatment should be routine for patients with acne and psychosocial comorbidities, especially those for whom isotretinoin is prescribed. It is also important to remember that istretinoin is a very effective and useful drug that has helped enormously the well being of many pateints with acne. There is also a growing literature in psychodermatology that is written by dermatologists, psychiatrists and psychologists who work in psychodermatology clinics and which offers clear guidance for the psychopharmacological and psychological management of psychodermatological disease [10]. They are also occasionally used cautiously in depression in the context of bipolar affective disorder, but as there is a risk of triggering a manic episode they should only be prescribed in such patients by a mental health specialist. The introduction of antidepressants with a better safety profile in overdosage than the old tricyclics has led to an increase in their prescription in recent years. These concerns have been contested but guidelines for treatment now reflect an increased caution in the prescribing of antidepressants. It should only be prescribed by specialists in child and adolescent mental health and is never used as first line treatment in children. Dose (adult Indications under 65 years) [27,28] 10­40 mg/day Depression Panic disorder starting an antidepressant the patient should be monitored carefully for suicidal ideation, this is especially important for patients under the age of 25 where the risk of this effect is greater. A review after 1 week may be important for those felt to be at high risk of selfharm, or those under 25 years of age, while a review after 2­6 weeks is suitable for others. Antidepressants should be continued for 6­9 months past the remission of symptoms as this helps reduce the risk of relapse. The most common side effects are nausea, dyspepsia and gastrointestinal upset, headache, agitation and anxiety, sweating, rashes, insomnia and sexual dysfunction. Hyponatraemia and increased risk of bleeding due to an effect on platelets can rarely occur. Escitalopram 5­20 mg/day Depression Generalized anxiety disorder Depression Panic disorder Social anxiety disorder Generalized anxiety disorder. It has minimal sexual side effects but is sedative and causes increased appetite and weight gain. These side effects can be helpful in patients with insomnia and loss of appetite, but it is important to warn normalweight patients of the propensity to gain weight and it is best avoided in overweight patients. They are still useful when sedation is required, as this can provide some immediate relief from the insomnia of depressive states, and aid concordance (Table 86. In lower doses tricyclics are commonly used by dermatologists for pruritus and 37. Side effects include dry mouth, blurred vision, constipation, sedation, urinary retention, openangle glaucoma and postural hypotension. Cardiotoxicity, including heart block, is recognized in larger doses and overdoses. Do not prescribe in patients where there is a risk of overdose as they are lethal in overdose. When switching from drug to drug it is necessary both to consider the potential for withdrawal reactions from the first drug, and also the possibility of interactions between the old and new agent. It has been recommended that if antidepressants have been taken continuously for 6 weeks or more they should not be stopped abruptly unless a serious adverse event has occurred. They should be withdrawn gradually and doses of new drugs are cross tapered upwards if possible. Interactions described on switching include the serotonin syndrome, cholinergic rebound, elevated levels of drugs due to pharmacokinetic interactions and excessive side effects due to pharmacodynamic interactions. In these conditions, particularly where there are somatic delusions and no insight, it is unlikely that the patient will accept referral to psychiatry and therefore prescription by the dermatologist is the only possibility of attempting a pharmacological intervention. Is usually weight neutral Weight gain Sedating Avoid in stroke disease and dementia in the elderly Split dosing or available in modifiedrelease form Avoid in stroke disease and dementia in the elderly Although there are no randomized controlled trials of the use of second generation antipsychotics, there are accumulating data in the literature about their use. A systematic review found that response rates for second generation antipsyhcotics are about 75% compared with 60­100% for first generation antipsychotics [15]. Quetiapine Risperidone 25­800 mg/day 2­16 mg/day Schizophrenia Mania Acute and chronic psychoses Mania anxiolytics the benzodiazepine anxiolytics can appear initially very effective in alleviating anxiety symptoms and states, but problems with tolerance and dependence rapidly develop, and they are frequently misused. They should be avoided, but if needed use should be limited to the short term (2 weeks). Buspirone has low dependence potential and is rarely misused, and is licensed for shortterm use in anxiety. Betablockers are used for autonomic anxiety symptoms but do not affect psychic symptoms or muscle tension. Part 7: Psychological, sensory & neurological drugs as they have a lower incidence of extrapyramidal and cardiotoxic side effects (Table 86. Some second and subsequent generation antipsychotics may be associated with drowsiness, weight gain, metabolic syndrome (abnormal glucose tolerance and lipid metabolism) and hyperprolactinaemia. Clozapine, in particular, is reserved for psychiatrist only use due to its association with severe agranulocytosis which requires close monitoring of the full blood count. Mood stabilizers Mood stabilizers are usually used in dermatology for dysaesthesias and postherpetic neuralgia, or are encountered when other specialists have initiated them. Pregabalin and gabapentin are the commonest medication to be commenced by dermatologists. These drugs are often started at lower doses and then titrated upwards according to clinical benefit. Valproate in various forms is used for different reasons in dermatology (including dysaesthesias and postherpetic neuralgia). Modifiedrelease forms of valproate are frequently used off licence for prophylaxis of bipolar disorders. Carbamazepine is licensed for the prophylaxis of bipolar disorder, and is also used in augmentation strategies for refractory depression.

Microscopic examination of pulled hair can be misleading as the triangular crosssectional appearance (at the origin of the name of the hair shaft defect) and the typical longitudinal grooves spasms hip buy generic imuran 50 mg line, which confer to the hair its rigidity muscle relaxant robaxin order imuran 50 mg without a prescription, are visible only on transverse section (or on scanning electron microscopy) [153] muscle relaxant drugs z discount 50 mg imuran with mastercard. In addition muscle relaxant dosage flexeril purchase imuran us, it has been described in association with skeletal dysplasias and other complex syndromes [153] spasms to the right of belly button discount 50 mg imuran free shipping. Pili pseudoannulati results from reflection of the light over flattened or twisted surfaces of the hair shaft, and is considered as a normal variant. Loose anagen syndrome should be distinguished from the short anagen syndrome [162] which is characterized by the inability to grow long hair because of an idiopathic short anagen phase. In contrast with loose anagen syndrome, it is not associated with hair unruliness, systemic diseases or skin disorders. The disorder is also associated with dysplastic nails, abnormal teeth and skeletal abnormalities including increased bone density and dolichocephaly due to premature fusion of the cranial sutures. Kinky hair is also found in Menkes disease, giant axonal neuropathy 1, Noonan syndrome and oculodentodigital dysplasia [165,166]. Loose anagen syndrome this disorder starts in early childhood and features hair which is easily pulled away from the scalp. The disease is thought to result from poor adhesion between the cuticle and the inner root sheath. Patients often seek medical advice because of slowgrowing hair and ensuing patchy alopecia. A diagnosis of loose anagen hair syndrome is based on the presence of 70% or more loose anagen hairs on a standard trichogram [159]. However, because loose anagen hair can often be seen in normal children and adults, the disorder may also be overdiagnosed. A report suggesting that a keratin defect may underlie the disease [160] has not been subsequently replicated. Loose anagen syndrome has been reported in association with pili triangulati and canaliculi as well as with a Noonanlike phenotype [161]. Spiky hair Spiky hair is a hallmark of the athyroidal hypothyroidism with spiky hair and cleft palate (Bamforth­Lazarus) syndrome, which also features choanal atresia and bifid epiglottis [167]. For example, the diagnosis of alopecia universalis congenita may require a skin biopsy as it is often difficult to distinguish this disorder from autoimmune alopecia areata. Once it is clear that a patient is affected by an inherited form of hypertrichosis (see Table 68. Although evidencebased treatment options are mostly nonexistent at this stage for most genotrichoses, a correct diagnosis may suggest the need for systemic workup (see Tables 68. Epithelial Wnt ligand secretion is required for adult hair follicle growth and regeneration. Included in this chapter are some of the more common hereditary nail disorders that are not described in detail elsewhere and have distinctive manifestations. A list of additional nonsyndromic and syndromic genodermatoses with nail abnormalities and their features is given in Table 69. The clinical features seen in virtually all affected patients are toenail thickening and plantar keratoderma often associated with plantar pain (Table 69. Based on genotype­ phenotype analyses of more than 250 patients showing that correlations of clinical features with underlying genotype were not absolute, this old terminology has been abandoned. The earliest and most common clinical feature is toenail dystrophy, which occurs overall in 97% of patients and is present at birth in 56. The 5th and hallucal toenails are most often affected, and almost 70% have involvement of all 10 toenails, which usually become dystrophic concurrently. Most patients develop dystrophy simultaneously in all 10 fingernails and all patients with fingernail dystrophy also have toenail dystrophy. By 5 years of age, approximately 75% of patients have toenail and fingernail changes. The nails typically have marked subungual hyperkeratosis with a pinched Vshape, but can sometimes show premature nail termination. Because keratins provide structural integrity to epithelial structures, mutations in these genes lead to cell fragility and compensatory hyperkeratosis. Abs to hypoplastic Skin: dermatoglyphic changes; simian crease Other: coarse face with thick lips, wide mouth and nose, anteverted nostrils fifth fingernails and toenails; and low nasal bridge; retardation of psychomotor and growth development; other nails occas hypotonia; lax joints; clinodactyly of the fifth fingers; general abs of terminal hypoplastic or phalanges of fifth fingers and toes; general aplasia or variable hypoplasia of abs middle and prox phalanges of other fingers and toes; bilateral or unilateral dislocation of the radial heads; small or abs patella; frequent respiratory infections; umbilical and inguinal hernias; cleft palate; feeding problems in infancy; six lumbar vertebrae; short sternum; microcephaly Dystrophic nails Keratopathy with neovascularization and corneal opacification, palmoplantar with prominent hyperkeratosis, dyshidrosis, corneal dyskeratosis, pruritic hyperkeratotic thickening of nail scars, palmoplantar hyperkeratosis, chronic rhinitis, raspy voice. There is also darkening of the periorificial areas, palmoplantar keratoderma and transient figurate erythema. Thickening tends to be focal and is most prominent at pressure points on the heel and ball of the foot; diffuse plantar involvement has occasionally been described [7]. Transgrediens spread (to the dorsal surface of the foot) has been described, especially 69. Plantar keratoderma is often complicated by painful erosions, fissures and/or bullae, which may be subcorneal and only detectable by imaging [9]. Palmar keratoderma occurs overall in fewer than 50% of patients, and only half of these show evidence of palmar keratoderma by 5 years of age [1]. Cysts and hyperkeratoses most often develop in schoolaged children, but can occur in younger children [1]. The nail changes lead to considerable embarrassment, particularly in adolescents, resulting in various strategies to conceal the nails [1]. The keratoderma impedes function, including walking, playing, schoolwork, a variety of other tasks and social development, especially in schoolage patients and adults. Oral retinoids can decrease plantar thickening in 50% of patients, but only decreased plantar pain in about onethird of cases, led to worsening or no improvement in nails in 87% of patients, and caused unacceptable side effects, especially at higher doses. Synonyms and inclusions · Zinsser­Engman­Cole syndrome C Management Mechanical treatment of the nails, such as filing, grinding and cutting is most effective, particularly after soaking the nails [13]. While antibiotics and antifungal therapy are helpful in managing secondary paronychia, they do not improve the nail dystrophy. Mechanical intervention can also ameliorate the keratoderma, but topical agents such as topical retinoids, steroids, keratolytics and moisturizers have not been found too helpful. Most patients are male, and Xlinked recessive inheritance accounts for approximately half of the cases. Autosomal recessive and autosomal dominant inheritance patterns have also been reported (see Table 69. The median age of diagnosis is 15 years, as many patients first present as teens or young adults. Mutations in one of 10 genes are found in approximately 60% of patients [2,3], and the protein products of these genes affect telomerase maintenance (see Table 69. When too short, telomeres signal the arrest of cell proliferation and lead to senescence and apoptosis, which particularly impacts rapidly dividing cells. Mildly affected nails show ridging and longitudinal grooving; severely affected nails are shortened and show pterygium formation. Cutaneous changes usually develop after the onset of nail changes, most commonly during late childhood to teenage years. Similar changes of the tarsal conjunctivae may result in atresia of the lacrimal ducts, excessive lacrimation, chronic blepharitis, conjunctivitis and ectropion. Overall, almost 90% of patients develop lifethreatening bone marrow failure, characterized by severe aplastic anaemia with neutropenia, splenomegaly and a haemorrhagic diathesis. Pulmonary fibrosis and hepatic cirrhosis are other life threatening complications. Epithelial tumours often first develop by the midteens, frequently in areas of mucosa with leukoplakia. Patients are at increased risk for the development of head and neck, as well as anogenital, squamous cell carcinomas. Patients usually die of bone marrow failure (60­70%), pulmonary disease (10­15%) or malignancy (10%). The diagnosis is often missed for several generations, although features tend to be present at birth. Recommended disease surveillance includes biannual blood counts, bone marrow evaluations annually, hepatic ultrasounds, annual pulmonary functional tests and skin cancer screening. For additional details on the anatomy and embryological development of the nails, the reader is referred to Chapter 95. Management Treatment of bone marrow failure is recommended with a haemoglobin persistently below 8 g/dL, platelets <30 000/mm3 and neutrophils <1000/mm3. Allogeneic stem cell transplantation is usually performed for bone marrow failure, but the 10year survival probability is 30% with mortality generally attributed to pulmonary or vascular complications related to disease progression [14] or toxicity related to myeloablative regimens. Management of patients otherwise consists of bougienage for oesophageal stenosis; fulguration, curettage and surgical excision of leukokeratosis of the buccal and anal mucosae; and lifelong regular supervision for early detection of mucosal or cutaneous carcinomas. Features Nail changes, especially triangular lunula Small or absent patella Elbow deformity Iliac horns Renal dysfunction Endstage renal disease Ocular hypertension, glaucoma % Of patients 98 74 70 70 40 5 33 Resources Patient resources Support group: Dyskeratosis Congenita Outreach. Radiographic evaluation is necessary to detect the iliac horns, although large horns may be palpable. Characteristic modifications of the glomerular basement membrane can be observed by electron microscopy. Orthopaedic complications are treated by physiotherapy, splinting or bracing, analgesics and occasionally surgery. Annual monitoring for hypertension, renal disease (urinalysis) and glaucoma is recommended. Hypertension should be controlled medically but renal transplantation is occasionally necessary. Patellar involvement is often asymmetrical and commonly characterized by small irregularly shaped or absent patella with recurrent dislocation or subluxation. Flexion contractures and early degenerative arthritis are common; as a result, patients often develop knee pain, locking, instability and inability to straighten the knee. Elbow involvement also is often asymmetrical and occurs in 70% of individuals [3]. The characteristic iliac horns are bilateral conical bone projections that extend posteriorly and laterally from the centre of the pelvic iliac bones. They affect approximately 70% of affected individuals, are asymptomatic and are pathognomonic for the disorder. Renal changes occur in 30­50% of affected individuals, initially as proteinuria with or without haematuria and hypertension; only 5% of patients show endstage renal disease, which may occur rapidly or develop gradually. Ocular hypertension and primary openangle glaucoma occur overall in onethird of patients and more often and at a younger age. Pachyonychia congenita in pediatric patients: natural history, features, and impact. Updates on the biology and management of dyskeratosis congenita and related telomere biology disorders. Outcomes of allogeneic hematopoietic cell transplantation in patients with dyskeratosis congenita. Differences in skin and hair colour are principally the result of differences in the melanin content of skin although other chromophores and skin thickness may also determine shade variation in the skin. Besides melanin, haemoglobin (in both the oxygenated and reduced state) and carotenoids contribute also significantly to skin colour (see Chapter 88). Melanocytes are responsible for the synthesis of melanin, a complex quinone/indolequinonederived mixture of biopolymers. Melanocytes migrate from the neural crest into the epidermis during the first 2 months of gestation. Racial and ethnic differences in skin colour are related to variation in the number, size, composition and distribution of melanosomes to surrounding keratinocytes. Constitutive pigmentation refers to the amount of melanin pigmentation that is genetically determined in the absence of sun exposure and other influences. The regulation of human pigmentation is complex and intertwined with other factors affecting epidermal or dermal­epidermal homeostasis. It involves both systemic and local factors secreted in the dermal or epidermal compartment. Once completely formed within melanocytes, melanosomes are transported along dendrites towards adjacent keratinocytes. The next step involves the extrusion of the melanosomes and their transfer into neighbouring keratinocytes, by a mechanism which is still debated. Keratinocyte terminal differentiation is accompanied by concomitant degradation of melanosomes so that no melanosomes are normally visible in the very upper part of the epidermis. Hundreds of genes are known to modulate pigmentation type or pattern in the skin, hairs/coat and eyes in mammals during or after development by acting directly or indirectly on the pigment cell lineage. Among these, only a few have been also found to underlie inherited monogenic pigmentation disorders (Table 70. Of interest, some genes known to be important for normal variation in skin, eye or hair colour are in this list. These disorders can be classified into three major groups: disorders of hypopigmentation, disorders of hyperpigmentation and disorders featuring combined hypo and hyperpigmentation, known as the dyschromatoses. This classical clinical classification is, however, in part misleading, since an overlap of phenotypes exist between the last two groups, as illustrated in this chapter. Monogenic pigmentary skin disorders: genetics and pathophysiology Isr Med Assoc J 2008;10:713­17. Clinical features the most typical and common clinical feature of the disease is a white forelock, often associated with a Vshaped area of leukoderma on the midforehead. Often, white patches occur on the upper chest, abdomen and limbs, bilaterally but not necessarily symmetrically. In addition, small spots of hyperpigmentation arise subsequently within the hypopigmented lesions or even on the background of normal skin. Piebaldism is usually not associated with extracutaneous manifestations; however, mental retardation or deafness have been reported in the context of a large deletion [4].

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References

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