Deverick John Anderson, MD

• Professor of Medicine

https://medicine.duke.edu/faculty/deverick-john-anderson-md

Consider bowel disease in any patient with an intermittent antiviral natural products discount prograf 5mg without prescription, inflammatory arthritis regardless of presence or absence of gastrointestinal symptoms hiv infection vomiting prograf 0.5 mg buy. Episodes of peripheral SpA may or may not coincide with flares of bowel disease aloe vera anti viral properties discount 5 mg prograf fast delivery, while axial SpA occurs independent of bowel disease activity hiv infection via saliva prograf 1 mg buy on line. Synovial fluid analysis reveals an inflammatory fluid (normally 5000­12 quick heal antiviral discount prograf 5mg on line,000 but can be up to 50,000 white blood cells/mm3, predominantly neutrophils) and 291 Downloaded for Anonymous User (n/a) at Egyptian Knowledge Bank from ClinicalKey. Active arthritis is chronic (90%), and episodes of exacerbations and remissions may continue for years. Development of one extraintestinal manifestation increases the likelihood of having a second. In patients with type 1 arthritis, most arthritic attacks occur during the first few years following onset of the bowel disease, but late occurrences can also occur. The episodes of arthritis coincide with flares of bowel disease in 60% to 80% of patients. It is directed against lactoferrin and less commonly bactericidal permeability-increasing protein, cathepsin G, lysozyme, or elastase. Treatment includes metronidazole and ciprofloxacin, but some patients develop antibiotic-refractory disease requiring immunosuppression. Patients present with watery diarrhea and may develop arthritic manifestations (10%­20%) or autoimmune thyroiditis. Conversely, up to 50% of patients with ankylosing spondylitis have inflammation of the bowel identified on colonoscopy. What triggers circulation of the gut-derived cells, though, remains unknown but possibly due to microbial signals in the gut and/or increased intestinal permeability due to local inflammation. What rheumatic manifestations have been described in patients with celiac disease (glutensensitive enteropathy) Some of these patients are mistakenly diagnosed as fibromyalgia with irritable bowel syndrome. Celiac disease occurs as an autoimmune reaction to wheat gluten/gliadin by T and B lymphocytes in the gut of genetically predisposed individuals. It is a relatively common disease affecting 1:70 to 1:300, most often in individuals of Northern European ancestry. Dietary gluten is partly digested by gastric enzymes to form a 33-amino acid peptide that is deaminated by tissue transglutaminase increasing its immunogenicity. Only 66% have characteristic bowel symptoms, whereas others will present with arthritis, vitamin D or B12 deficiency, iron deficiency anemia, cerbellar disease, infertility, or peripheral neuropathy. However, autoantibody testing is very helpful in screening individuals prior to biopsy. On a gluten-rich diet in people who are not IgA-deficient, IgA antibodies against tissue transglutaminase have a high sensitivity (95%) and specificity (90%) for celiac disease. Due to poor specificity, antigliadin antibodies are no longer used to screen for celiac disease. Affected patients develop a flu-like syndrome consisting of fevers, malaise, arthritis, myalgia, and rashes. The arthritis is nonerosive, inflammatory, oligoarticular, and frequently migratory, affecting both upper and lower extremity small and large joints. The rash is maculopapular or vesiculopustular usually on the upper extremities and trunk. The pathogenesis involves bacterial overgrowth in a blind loop of bowel resulting in antigenic stimulation causing immune complex formation (frequently cryoprecipitates containing bacterial antigens, secretory IgA, and complement) in the serum that deposits in the joints and skin. Only surgical reanastomosis of the blind loop can result in complete elimination of symptoms. Synovial fluid is typically noninflammatory and creamy in color due to lipid droplets that stain with Sudan black or oil red O. These are frequently misdiagnosed as erythema nodosum but are areas of lobular (not septal) panniculitis with fat necrosis. C-Cancer of the pancreas more commonly causes this syndrome than does pancreatitis. R-Radiographic abnormalities due to osteolytic bone lesions from bone marrow necrosis (10%). A-Amylase, lipase, and trypsin are elevated due to release by a diseased pancreas and cause the fat necrosis in skin, synovium, and bone marrow. It can occur in all age groups (bimodal peak 10­20 years, 45­70 years), but most patients are young and predominantly female (70%). Patients do not usually have associated rheumatic manifestations but commonly develop type I diabetes, vitiligo, and autoimmune thyroid disease. What dose adjustments need to be made for antirheumatic medications in patients with severe hepatobiliary disease Severe liver disease can be defined as a combination of one or more of the following factors: elevated bilirubin > 3 mg/dL, albumin < 3 g/dL with ascites, elevated prothrombin time/international normalized ratio not fully corrected by vitamin K, and/or cirrhosis on liver biopsy. Elevated transaminases greater than three times upper limit of normal should also be a concern. Also note that since creatine is synthesized in the liver, serum creatinine may be an overestimate of renal function. Hepatobiliary disease may substantially impair the elimination or activation of drugs that the liver metabolizes or excretes. In addition, decreased synthesis of albumin may lead to increased free fraction of the active drug. Decreased synthesis of vitamin K-dependent clotting factors may lead to increased risk of bleeding if a medication affects platelet function or number. The following are guidelines for antirheumatic drug therapy in severe liver disease: · Pro-drug metabolism-azathioprine, leflunomide, cyclophosphamide, prednisone, and sulindac need to be converted to the active moiety by the liver. Would avoid or use tocilizumab and tofacitinib with caution since they can have liver toxicity. Thus, a dose adjustment is likely needed for Child­Pugh class B and recommend avoidance in class C. Analysis of five chronic inflammatory diseases identifies 27 new associations and highlights disease-specific patterns at shared loci. Autoimmune hepatitis, one disease with many faces: etiopathogenetic, clinico-laboratory and histological characteristics. The prevalence and incidence of axial and peripheral spondyloarthritis in inflammatory bowel disease: a systematic review and meta-analysis. Patterns of autoimmunity in primary biliary cirrhosis patients and their families: a population-based cohort study. Reactive arthritis (ReA) is a sterile inflammatory arthritis, typically preceded by a gastrointestinal or genitourinary infection occurring 1 to 4 weeks prior. Long-term antibiotics may help chronic Chlamydia-induced ReA but does not affect the course of ReA associated with enteric pathogens. Over 50% of patients have a self-limited course lasting 3 to 5 months, 30% have recurrent episodes, and 15% to 20% have a chronic course requiring immunosuppressive therapy. ReA is a sterile inflammatory synovitis occurring within 4 weeks of an infection elsewhere in the body, primarily urogenital or enteric infections. The arthritis is typically an asymmetric oligoarthritis that predominantly involves large lower extremity joints. The causative organism cannot be cultured from fluid in the joint cavity; however in recent years it has been shown that antigens of the triggering microbe can be detected in the synovial fluid or synovial tissue of the affected joints. The triad is now considered to be a subset of ReA because two-thirds of patients do not have all three features. However, the development of ReA is strictly dependent on infection with certain organisms predominantly acquired through mucosal surfaces, enterogenic or urogenital (see Question 6). These patients tend to have more severe arthritis, extraarticular manifestations, higher prevalence of sacroiliitis, and a protracted course. These cases have a milder oligoarthritis with fewer systemic symptoms or extraarticular manifestations. Alternatively, the similarity between the microbial and self-peptides may allow microbial fragments to persist due to an inadequate immune response. Urogenital Enterogenic Chlamydia trachomatisa, Ureaplasma urealyticumb, Mycoplasma genitaliumb Salmonellaa typhimurium, S. Coli Clostridium difficileb Escherichia colib, Diarrhogenic strains Giardia lambliab Chlamydia pneumoniaeb Group A beta-hemolytic Streptococcusb,c Human immunodeficiency virusb,d Helicobacter pylori Vibrio parahaemolyticus Mycobacterium bovis Calmette-Guerin Bacillus Klebsiella pneumonia Strongyloides stercoralis 299 Respiratory Viral Multiple sources, case reports onlye infections associated with ReA. Patients with enterogenic ReA exhibit higher relative risk for women than for men (1. ReA is one of the most common types of inflammatory arthritis affecting young adult men. Although the initial infection may be mild or inapparent (10%­30%), most patients will develop systemic symptoms within 1 to 4 weeks. Constitutional Low-grade fever Weight loss (rare) Downloaded for Anonymous User (n/a) at Egyptian Knowledge Bank from ClinicalKey. Circinate balanitis and keratoderma blennorrhagicum are relatively specific for ReA. Similarly, keratoderma blennorrhagicum refers to psoriasiform lesions occurring primarily on the plantar surface of the heel and metatarsal heads. Both lesions are predominantly associated with urogenital ReA (Chlamydia) and resolve spontaneously. Arthritis: In ReA, the joints tend to be moderately inflamed and characterized by prolonged stiffness. Joint involvement is typically asymmetric, oligoarticular (less than five joints), and confined to the knees, ankles, and/ or feet. Enthesitis: An inflammation of the ligament, tendon, joint capsule, or fascia insertion site into bone (enthesis). In ReA, enthesitis commonly causes heel pain (Achilles tendon and plantar fascia), metatarsalgia (plantar fascia), and iliac spine/crest pain. Enthesitis are common in ReA, and may help distinguish it from other differential diagnosis. Dactylitis: "Sausage" digits of fingers and toes are due to a combination of arthritis, enthesitis, and tendinitis. Sacroiliitis/spondylitis: Up to 40% of patients with ReA may have axial skeleton symptoms, and 25% develop radiographic changes. A comparison of the clinical features of ReA with gonococcal arthritis is given in Table 36. A comparison of the clinical features of ReA with rheumatoid arthritis is given in Table 36. The diagnosis of ReA is clinical, and no laboratory investigation can substitute for a proper history and physical examination. Arthrocentesis is the most valuable test because it excludes septic and crystalline arthritis (Table 36. The synovial fluid typically reveals a predominance of leukocytes, ranging from 2000 to 50,000 cells/mm3. In acute ReA, most of these cells are neutrophils, but in chronic disease, either lymphocytes or monocytes may be prevalent. Other synovial fluid characteristics include decreased viscosity, normal glucose level, and increased protein. These radiographic features are typical of all seronegative spondyloarthropathies. There are large nonmarginal syndesmophytes called "jug-handle" syndesmophytes, which usually occur in an asymmetric distribution. B-Bony reactivity and proliferation at enthesis sites (Achilles tendon and plantar fascia insertions) and periostitis are common. C-Cartilage space narrowing occurs uniformly across the joint space of weight-bearing joints compatible with an inflammatory arthritis. D-Distribution of arthritis is primarily in the lower extremity, whereas psoriatic arthritis usually affects the upper extremity. Urine polymerase chain reaction for Chlamydia and stool cultures may be helpful in patients with urethritis or diarrhea, respectively. Serologic tests for Chlamydia, Salmonella, and Yersinia can be done depending on the suspected inciting agent. How do the radiographic features of sacroiliac and spine involvement in ReA compare with those in ankylosing spondylitis Note that 100% of patients with ankylosing spondylitis develop radiographic changes in the sacroiliac joints compared with only 20% to 25% of ReA patients (Table 36. Patients with inflammatory bowel disease also develop radiographic changes of their spine similar in appearance to those of ankylosing spondylitis, whereas psoriatic arthritis produces changes similar to ReA. Note: Unilateral sacroiliitis without peripheral arthritis does not occur in ReA and should suggest another diagnosis. Transient relief of joint inflammation may be obtained by use of ice packs and/or warm compresses. Once inflammation subsides (1­2 weeks), passive strengthening and range of motion exercises should be initiated. Elimination of the "triggering" infection with appropriate antibiotics is the first therapeutic goal in ReA. This is especially true for acute Chlamydia infections (azithromycin 1 g single dose or doxycycline 100 mg twice daily for 7 days, patient and partner). Patients with a history of Chlamydia-related ReA should be evaluated for recurrent genitourinary infection if arthritis or genitourinary symptoms recur and should be retreated with antibiotics if testing for Chlamydia is positive. However, some patients with enteric infections may require treatment depending upon their comorbidities. Describe the pharmacologic management of the extraarticular manifestations in ReA.

Syndromes

• You feel the urge to hurt yourself or others
• Amnesia for events prior to, during, and even after the period of unconsciousness
• Low body temperature (hypothermia)
• You have unusual vaginal bleeding, swelling, or discharge.
• Hitting own body
• Keep your blood from clotting
• Bone pain or tenderness

Describe the three characteristic temporal patterns of joint involvement in polyarthritis hiv infection lawsuit discount prograf 1 mg otc. Crystalline arthropathy is the most common category causing this pattern of arthritis hiv infection diarrhea buy generic prograf on-line. How is the distribution of joint involvement helpful in the differential diagnosis of polyarthritis Knowledge of the typical joints involved in each disease is a cornerstone of diagnosis in polyarthritis hiv infection without fever buy prograf mastercard. In practice hiv infection rates asia 0.5 mg prograf mastercard, knowledge of which joints are spared in each form of arthritis is also quite useful hiv infection rates in south africa purchase genuine prograf online. What are the most likely diagnoses in women aged 25 to 50 years who present with chronic polyarticular symptoms What are the most likely diagnoses in men aged 25 to 50 years who present with chronic oligoarticular or polyarticular symptoms What are the most likely diagnoses in patients aged over 50 years presenting with chronic polyarticular symptoms Morning stiffness refers to the amount of time it takes for patients with polyarthritis to "limber up" after arising in the morning. In such patients, especially in the presence of immunosuppressive medications, a fever should be presumed secondary to infection until proven otherwise. How is its presence useful in the differential diagnosis of polyarticular symptoms Tenosynovitis is inflammation of the synovial-lined sheaths surrounding tendons in the wrists, hands, ankles, and feet. Physical examination usually reveals tenderness and swelling along the track of the involved tendon between the joints. List skin lesions that can be useful in the diagnosis of acute or chronic polyarthritis. Which tests are most useful in evaluating a patient with chronic polyarticular symptoms In some patients, consider serum uric acid, thyroid-stimulating hormone, iron studies, human leukocyte antigen-B27, and synovial fluid analysis. The history and physical examination should be directed toward the clinical findings commonly seen in these diseases. A careful medication history may reveal that the patient has received drugs that can cause drug-induced lupus (see Chapter 17: Drug-Induced Lupus). An absence of objective findings on exam, coupled with lack of end-organ dysfunction through laboratory evaluation, is reassuring evidence against a rheumatic etiology. Which chronic polyarticular diseases are most likely to be associated with low serum complement levels Low serum complement levels (C3, C4, and total hemolytic complement) usually suggest the presence of an immune complex disease. In many instances, the liver is unable to produce these components as rapidly as they are consumed, resulting in a fall in serum levels. When should arthrocentesis for synovial fluid analysis be considered in the evaluation of polyarthritis If it can be obtained, synovial fluid analysis can be useful in the diagnosis of bacterial joint infection and crystal-induced arthritis. Even if a specific diagnosis is not forthcoming, synovial fluid analysis reduces the list of diagnostic possibilities by categorizing the process as either inflammatory or noninflammatory. As a general rule, patients with acute polyarticular arthritis will not benefit from joint radiographs. Radiographs are most valuable in evaluating chronic arthritis that has been relatively long-standing and that has resulted in characteristic changes in joints. Why should the rheumatologist consider a Zen-like approach to the evaluation of chronic polyarthritis Many chronic polyarticular diseases may require months or years to diagnose; therefore, tremendous patience is often required. This prolonged but necessary period of observation may be frustrating to many patients (and providers) who may expect an immediate diagnosis. Contentment lies in the acceptance of the complexities of life and the ability to let go of this desire and longing. Clinicians and trainees that desire clearly defined diagnoses at presentation may be more content in fields where fractures and acute coronary syndrome are commonplace. In contrast, the characteristics of chronic polyarticular diseases require an extraordinary degree of patience and a long-term perspective, in that: · Many present insidiously with few objective findings for prolonged times. As Sir William Osler famously said, "Medicine is a science of uncertainty and an art of probability. Peripheral neuropathies are often distal and symmetric, whereas lesions of the nerve root, plexus, and mononeuritis multiplex are asymmetric. The statin drugs are the most common cause of drug-induced myopathy and usually present with myalgia. Rheumatic diseases can affect any part of the peripheral nervous system through different mechanisms. For example, chronic synovitis, joint contractures, and deformities seen in rheumatoid arthritis can lead to muscle atrophy, weakness, and nerve compression. Other rheumatic diseases such as polymyositis are dominated by immune-mediated inflammation of the muscle, though the differential diagnosis of myopathy is quite broad. Neuromuscular manifestations of rheumatic diseases may present as early and dominant findings, or as late complications of well-established diseases. There may also be complications of therapy for rheumatic diseases, as with the use of glucocorticoids. Weakness, alteration in sensation, and/or pain are the most common symptoms reported by patients. Fatigue differs from weakness in that fatigue is a loss of strength with activity that recovers with rest. The first step is to exclude systemic causes of fatigue or weakness, such as cardiopulmonary disease, anemia, hypothyroidism, malignancy, sleep apnea, or depression. Many of these patients have malaise rather than weakness, and their examination usually fails to reveal true muscle weakness if they give their best effort. The carefully directed history and physical examination, combined with focused laboratory testing, are usually effective in eliminating these causes of weakness (Box 13. A useful method of categorizing neuromuscular diseases is by their customary level of anatomic involvement, beginning with the spinal cord and proceeding distally through nerve roots, peripheral nerves, neuromuscular junctions, and muscle. Acute pure spinal cord lesions are typically not painful, although occasionally painful extensor or flexor muscle spasms will occur. Nerve root compression commonly produces pain and paresthesias in the affected nerve distribution. Peripheral nerve disease is often manifested by numbness and paresthesias; weakness can be seen when motor nerves are involved. In sorting them out, the following concepts are useful: · Inflammatory myopathies are usually dominated by weakness, not pain. The exception to this rule is when the inflammatory myopathy has a fulminant onset, when pain may be a dominant feature. How does the distribution of weakness, numbness, or pain aid in differentiating neurogenic from muscular lesions Myopathies tend to cause proximal and symmetrical (bilateral) weakness and/or pain involving the shoulder girdle and hip girdle. Neuromuscular junction involvement presents with weakness involving ocular, bulbar, and proximal muscles without numbness or pain. Peripheral neuropathies most commonly cause distal (hands and feet) numbness, weakness, and/or pain. Nerve root compression causes asymmetric weakness and pain that may be either proximal or distal, depending on the level of the involved nerve root. Spinal cord lesions usually are associated with a distinct sensory level around the trunk or abdomen if above the lumbar spine. Distal spastic weakness, often with impairment of bowel and bladder sphincter function, is also a feature of spinal cord disease. Abrupt onset of weakness is more characteristic of Guillain­Barré syndrome, poliomyelitis, and hypokalemic periodic paralysis. Intermittent weakness may occur with myasthenia gravis, the rare causes of metabolic myopathy, and hypokalemic periodic paralysis. Gradual onset of weakness or pain is typical of most muscle diseases, including inflammatory myopathies, muscular dystrophies, and endocrine myopathies, as well as most neuropathies. Fatigability is defined as progressive weakness of muscle with repetitive use, followed by recovery of strength after a brief period of rest. It is a classic finding in myasthenia gravis often involving eye movements, eyelids (ptosis), and proximal upper extremity muscle groups. Lambert­Eaton myasthenic syndrome is often the reverse of myasthenia gravis, where there is a paradoxical increase in the muscle strength observed with repetitive muscle contraction. Many of the muscular dystrophy syndromes have strong patterns of inheritance (Table 13. Glucocorticoids, Chloroquine, Alcohol, D-Penicillamine, Statins, Emetine, Hydroxychloroquine, Colchicine, Cocaine, Fibrates, Zidovudine, Amiodarone, Interferon, Antifungals 12. Their toxicity affects peripheral nerves and the neuromuscular junction leading to flaccid weakness, depressed deep tendon reflexes, and pupillary dilation. What are the key elements of the physical examination in the evaluation of neuromuscular symptoms A patient attempts to rise from a seated position by climbing up his legs with his hands. It is seen in patients with proximal lower extremity muscular weakness due to myopathy. Because there is a wide range of muscle strength between grades 5 and 4, it is common to assign intermediate values such as 5­ or 4+ to many muscle groups in the examination (Table 13. How can alterations in deep tendon reflexes aid in differentiation of neuromuscular diseases Of note, acute spinal cord lesions can occasionally lead to depressed or absent reflexes initially. Late in the disease process, however, substantial muscle atrophy may cause reduction or loss of the reflex. Which screening laboratory tests can evaluate for systemic causes of neuromuscular symptoms Mononeuritis multiplex is a pattern of motor and sensory involvement of multiple individual peripheral nerves that is a classic neurologic presentation of systemic vasculitis. First, one peripheral nerve becomes involved (usually with burning dysesthesias), followed by other individual nerves, often with motor dysfunction as well. The patchy nature of nerve involvement reflects the patchy vasculitis of the vasa nervorum, which is the underlying cause of the neuropathy. What are the most common causes of proximal shoulder girdle and hip girdle aches, pains, and/or weakness Six diseases are responsible for >90% of diffuse, proximal aches or weakness (Table 13. To determine if true weakness is present, the examiner should ask the patient to ignore any pain that may occur during muscle strength testing so that a true measure of muscle strength can be determined. Often patients can provide a brief full strength effort and then giveaway when pain is the predominant cause. Although patients with fibromyalgia syndrome and polymyalgia rheumatica may complain of weakness in addition to pain, they are not truly weak on physical examination. Manifestations include limb muscle weakness, reduced or absent deep tendon reflexes, loss of distal sensation, and respiratory insufficiency due to phrenic nerve involvement. Patients have severe muscle weakness, preserved reflexes/sensation, and difficulty weaning off a ventilator. Treatment is supportive care, limiting the use of glucocorticoids and paralytics, and nutritional support. What rheumatic syndromes should be considered in the differential diagnosis of cerebrovascular disease Most cerebrovascular diseases occur in patients aged over 50 years as a result of long-standing hypertension, atherosclerosis, and cardiac emboli. When ischemic cerebrovascular disease occurs in patients aged <50 years, the possibility of several rheumatic syndromes should be especially considered: (Box 13. A guideline for hip and knee arthroplasty published in 2017 provides guidance regarding antirheumatic therapy management for elective total hip and knee replacements. An acutely painful, swollen joint in the postoperative period must be aspirated and evaluated for both infection and crystals. Why is it important for rheumatic disease patients to be evaluated perioperatively Patients with rheumatic diseases can have unique problems because of their underlying rheumatic disease, complications of medical therapy including immunosuppression and limitations in functional status. The perioperative evaluation can identify factors that may contribute to surgical risk so that appropriate action can be taken to reduce the risk of complications. List the essential items to review in the perioperative evaluation of a patient with a rheumatic disease. The term "clearance" was used at a time when the goal of the preoperative assessment was to crudely divide patients into those able to tolerate surgery ("cleared") and those unable to tolerate surgery. The term is largely historical as patients are uncommonly excluded from consideration for an operative procedure on the basis of their underlying medical conditions. However, patients with rheumatic diseases may be at increased risk for perioperative complications due to a variety of factors.

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It is important that the individual selects an exercise program that is enjoyable describe the hiv infection cycle generic prograf 5mg online, easily done boots antiviral foam norovirus prograf 1mg buy without prescription, and possible to accomplish hiv infection rate dominican republic cheap prograf 0.5 mg overnight delivery. When done in a warm pool hiv infection law buy 0.5mg prograf with amex, the individual can move affected joints hiv infection symptoms pictures prograf 5 mg order overnight delivery, strengthen periarticular muscles, and improve cardiovascular fitness, all without bearing weight on diseased joints. Other good options include bicycling, walking, elliptical training, and cross-country skiing. Medications are used, therefore, to alleviate symptoms and increase function with the least toxicity. In these patients, using the smallest effective dose and/or intermittent dosing is prudent if possible. However, in a single joint with an inflammatory component, intraarticular corticosteroids (see Chapter 82: Glucocorticoids- Systemic and Injectable) can be helpful. Consequently, compound amount, purity, long-term safety, and product labeling are not guaranteed. Approximately 90% of glucosamine sulfate is initially absorbed, with half of that being removed by the liver. This leaves a bioavailable dose for distribution to joints of only 45%, with only half of this. Gastrointestinal absorption of chondroitin sulfate is even lower, with only 15% to 24% being bioavailable. Glucosamine is the principal component of glycosaminoglycans, which form the matrix of all connective tissue including cartilage. In vitro studies show that glucosamine is incorporated into and increases synthesis of proteoglycans by chondrocytes. In vitro, chondroitin sulfate has a tropism for cartilage and can stimulate proteoglycan synthesis and block certain proteases. Guidelines for patients who wish to take these medications are as follows: · Glucosamine sulfate is three times better absorbed than glucosamine hydrochloride. Hyaluronan (sodium hyaluronate) is a glycosaminoglycan found in the synovial fluid that allows viscous lubrication at low loads and shock absorbency at high loads. In the synovial fluid of a normal joint, there is 4 to 8 mg of hyaluronan with a molecular weight of 5 million daltons. In the synovial fluid of an osteoarthritic joint, there is less hyaluronan with a molecular weight of 2 to 3 million daltons, making it less effective for lubrication/shock absorbency. Intraarticular hyaluronan appears to be safe and can be repeated in patients who get prolonged improvement (>18­26 weeks). Hyaluronan may have chondroprotective (stimulates proteoglycan synthesis), antiinflammatory (scavenger sink for inflammatory mediators), and antinociceptive effects, which may explain its prolonged symptomatic benefit, even though the hyaluronan can only be detected for a few days (intraarticular half-life is 17­36 hours) in the joint after the injection. There are several different formulations with varying molecular weights, composition, side-effect profiles, and frequency of injections. If a knee effusion is present, the synovial fluid should be drained before injection of hyaluronan in order to get best results. Corticosteroids have been shown to provide benefit earlier following injection, with a small statistical edge for viscosupplementation at 6 months. Because of a difference in cost, some physicians will use intraarticular corticosteroids before going to viscosupplementation. A similar conservative approach with viscosupplementation would be reasonable given the cost of medication. An Downloaded for Anonymous User (n/a) at Egyptian Knowledge Bank from ClinicalKey. Matrix-assisted autologous chondrocyte implantation has had promising results in initial clinical studies. Microdrilling of subchondral bone releases autologous mesenchymal stem cells from the bone marrow that attempt to repair the osteoarthritic cartilage. Theoretically, when the injected platelets degranulate, several factors are released, including transforming growth factor beta, platelet-derived growth factor, epidermal growth factor, and insulin-like growth factor. These factors may inhibit inflammation, offer chondroprotection, and increase cartilage synthetic activity. Intraarticular injection of mesenchymal stem cells have had inconsistent results thus far, with a need for higher-quality studies. The rate of progression can be variable, and once symptomatic, the disease may seem to progress quickly. There may be rare individuals in whom the disease may remain stable or even improve somewhat. Efficacy of joint lavage in knee osteoarthritis: meta-analysis of randomized controlled studies. Comparative effectiveness of pharmacologic interventions for knee osteoarthritis: a systematic review and network meta-analysis. Glucosamine, chondroitin sulfate and the two in combination for painful knee osteoarthritis. Foot orthoses and physiotherapy in the treatment of patellofemoral pain syndrome: randomized clinical trial. Prospective, multicenter, randomized, crossover clinical trial comparing the safety and effectiveness of cooled radiofrequency ablation with corticosteroid injection in the management of knee pain from osteoarthritis. Correlation of the development of knee pain with enlarging bone marrow lesions on magnetic resonance imaging. American College of Rheumatology 2012 recommendations for the use of nonpharmacologic and pharmacologic therapies in osteoarthritis of the hand, hip, and knee. Injections for knee osteoarthritis: corticosteroids, viscosupplementation, platelet-rich plasma and autologous stem cells. Intra-articular botulinum toxin type A: a new approach to treat arthritis joint pain. Effect of intra-articular triamcinolone vs saline on knee cartilage volume and pain in patients with knee osteoarthritis: a randomized clinical trial. Current Status of nerve growth factor antibodies for the treatment of osteoarthritis pain. Femoroacetabular impingement syndrome: an underrecognized cause of hip pain and premature osteoarthritis A comparative study of Botulinum Toxin A with Triamcinolone compared to Triamcinolone alone in the treatment of osteoarthritis of knee. Associations Between Clinical Evidence of Inflammation and Synovitis in Symptomatic Knee Osteoarthritis: A Cross-Sectional Substudy Arthritis Care Res (Hoboken). Efficacies of different preparations of glucosamine for the treatment of osteoarthritis: a meta-analysis of randomized, double-blind, placebo-controlled trials. Intra-articular injection of mesenchymal stem cells in treating knee osteoarthritis: a systematic review of animal studies. The major risk factors for fragility fractures are low bone mass, advancing age, previous fragility fractures, corticosteroid use, and the propensity to fall. Disorders causing secondary bone loss are present in approximately one-third of women and two-thirds of men who have osteoporosis. Patients with osteoporosis should have a complete history and physical examination and key, cost-effective laboratory tests to identify any underlying responsible disorders. Osteoporosis is a skeletal disorder characterized by compromised bone strength, which predisposes to the development of fragility fractures. Fragility fractures are those that occur spontaneously or following minimal trauma, defined as falling from a standing height or less. Up to 40% of women and 20% of men develop one or more osteoporotic fractures during their lifetime. However, relying on hospitalized fractures may underestimate the true prevalence of fragility fractures, since many fractures do not require hospital treatment and approximately two-thirds of all vertebral fractures are not clinically diagnosed. Approximately one-third of all vertebral fractures are painful, but two-thirds are asymptomatic. Hip fractures are associated with permanent disability in nearly 50% of patients and with a 20% excess mortality rate compared with the age-matched nonfracture population. Pearl: An older person is more likely to suffer a fracture than a younger person with the exact same T-score. Back pain or tenderness are helpful clues but may be absent since two-thirds of vertebral fractures are asymptomatic. Height loss of >2 inches or dorsal kyphosis are highly suggestive clinical findings. The radiation exposure is minimal with only 1 to 3 uSv/site compared with 50 to 100 uSv for one chest radiograph. Peripheral densitometry measurements (heel, radius, hands) are more widely available and less expensive, but are less accurate. A low Z-score is predictive of an underlying secondary cause other than age or menopause. Pearl: An older patient is more likely to fracture than a younger individual with the exact same T score. It is recommended to be used for making treatment decisions in drug-naïve patients aged >40 Downloaded for Anonymous User (n/a) at Egyptian Knowledge Bank from ClinicalKey. Treatment is advised for those who have a 10-year risk >3% for hip fracture or >20% for major osteoporosis fractures. It should not be used alone as it is not validated as a tool for monitoring therapy. Nonmodifiable Advanced age Race (Caucasian, Asian) Female sex Early menopause Slender build (<127 lb) Positive family history (hip fx) Modifiable Low calcium intake Low vitamin D intake Estrogen deficiency Sedentary lifestyle Cigarette smoking Alcohol excess (>2 drinks/day) Caffeine excess (>2 servings/day) Downloaded for Anonymous User (n/a) at Egyptian Knowledge Bank from ClinicalKey. Serum protein electrophoresis (if aged >50 years with abnormal complete blood count). Pearl: A patient needs a calcium (corrected for albumin level) x phosphorous product of 24 to properly mineralize bone. Approximately one-third of women and two-thirds of men will have an abnormality detected with this evaluation. Therefore, this cost effective evaluation is recommended in all patients with osteoporosis. A low Z-score suggests that an underlying secondary cause is even more likely to be present. Pearl: the most predictive factor for a future fall is a previous fall within the past 6 months. The diagnostic criteria are the same in men as in women (fragility fracture, T-score <­2. Treatment is generally the same in men as in women, although testosterone replacement in hypogonadal men is an effective adjunctive strategy. When should pharmacological therapy be initiated for osteoporosis (see Chapter 87: Bone Strengthening Agents) Pharmacological therapy should be advised for any patient who has osteoporosis based on any of the three criteria discussed earlier (see Question 5): · History of vertebral, hip, wrist, or humerus fragility fracture · T-score <­2. They impair bone formation by promoting apoptosis of existing osteoblasts and reducing the development of new osteoblasts. They increase bone resorption by decreasing the production of sex steroids and osteoprotegerin, an endogenous inhibitor of bone resorption. Teriparatide is a good option for high-risk patients who have the lowest T-scores (­2. Consider teriparatide if pregnancy anticipated · High-risk patients: same as medium-risk patients or teriparatide. Use teriparatide in high-risk patients (Z-score ­3 and history fragility fracture). Therapeutic guidelines for premenopausal women with childbearing potential, who have had a previous fragility fracture, recommend treatment only if they are continuing prednisone. Oral risedronate theoretically may be the safest oral bisphosphonate in this circumstance due to potential of less fetal toxicity should the patient become pregnant. Patients on daily inhaled steroids (equivalent or higher dose than Advair 200 g/day) for a prolonged period of time (20 years) can lose bone (one T-score = 12% bone loss) and should be periodically monitored. There are two natural forms of vitamin D: cholecalciferol (D3) and ergocalciferol (D2). Humans acquire vitamin D by two routes-endogenous synthesis in the skin during sunlight exposure (D3) and dietary intake (D2 and D3). The latter binds to intestinal vitamin D receptors to promote calcium and phosphorous absorption. Osteomalacia, which means "soft bones," results from impaired mineralization of bone matrix due to inadequate concentrations of serum phosphate and/or calcium, resulting in a low serum calcium x phosphate product, or from a circulating inhibitor of mineralization. Bone biopsies show increased osteoid seams but with reduced hydroxyapatite deposition. Additionally, there are three main inherited disorders resulting in congenital rickets: 1. This disorder was previously termed "Vitamin D-Dependent Rickets Type 1" because some patients partially respond to high-dose vitamin D therapy. This disorder was previously termed "Vitamin D-Dependent Rickets Type 2" because some patients partially respond to high-dose vitamin D therapy. Congenital vitamin D resistance: genetic mutations resulting in defective or absent vitamin D receptors cause impaired vitamin D action leading to chronic intestinal calcium and phosphate malabsorption. This disorder was previously termed "Vitamin D-Resistant Rickets" because high-dose vitamin D therapy is not beneficial. Since rickets results from mineralization defects that occur during bone maturation, some clinical manifestations are distinct from those observed with osteomalacia in adults. Clinical features include bone pain, deformities, fractures, muscle weakness, and growth retardation. However, x-rays may show delayed opacification of the epiphyses, widened growth plates, widened and irregular metaphyses, and thin cortices with sparse, coarse trabeculae in the diaphyses. Oncogenic (tumor-induced) osteomalacia is a rare cause of osteomalacia in adults and rickets in children.

Diseases

• Axial osteosclerosis
• Muscular dystrophy limb girdle type 2A, Erb type
• Facio thoraco genital syndrome
• Short stature contractures hypotonia
• Motor neuron disease
• Sternal cyst vascular anomalies
• Apparent mineralocorticoid excess

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