Bruce A. Fenderson, PhD

• Professor of Pathology, Department of Pathology, Anatomy, and Cell Biology, Jefferson Medical College,
• Thomas Jefferson University, Philadelphia, Pennsylvania

Typically medications similar buspar trazodone 100 mg buy mastercard, the patient is placed in a supine position and the leg in question is elevated symptoms gout cheap trazodone 100 mg overnight delivery. A tourniquet is placed around the proximal thigh and the patient is asked to stand up medicine in french order trazodone online from canada. The tourniquet should be tight enough to occlude only the superficial system while keeping the deep system unobstructed medications via ng tube buy 100 mg trazodone with amex. The veins are then carefully inspected to assess the time taken for them to refill medicine 319 pill generic trazodone 100 mg buy. In individuals without venous insufficiency, the veins need 3­5 seconds to refill normally from the capillaries. Earlier refill is indicative of reflux below the tourniquet from the communicating perforator veins or the saphenous vein itself. If the veins do not refill after 20 seconds, the tourniquet is released and the vein is observed for refill. If it now refills in less than 20 seconds, this is indicative of reflux originating proximal to the level of the tourniquet. With the patient supine, a compression bandage is applied to the leg tightly enough to occlude the superficial venous system. If the patient develops severe pain upon walking, this indicates significant deep venous obstruction and suggests that the superficial venous system has been acting as an important collateral and contributor to the venous drainage of the lower extremity. Although the Trendelenburg and Perthes tests can be useful, the inherent inaccuracies of applying the tourniquet or elastic bandages and the presence of other more direct objective testing modalities have led to a decrease in their use. This shows prominent skin bulges over the varicosities of the posterior arch vein, together with widespread venular dilatation and loss of ankle contour in a postphlebitic leg. Because the association between the severity of the disease and its clinical signs and symptoms varies among patients, a clinical classification of the disease can be made using the Clinical­Etiology­Anatomy­Pathophysiology criteria (Table 32. This classification system allocates a different grade depending on the presence of certain findings on physical examination. Oedema, skin changes and healed or active ulcers signify more advanced Duplex Ultrasonography this has become the imaging modality of choice for assessing the superficial and deep venous circulation of the lower extremity. Valvular incompetence and reflux can also be documented on duplex ultrasonography by demonstrating a reflux time of more than 0. A normal venous duplex scan usually shows a compressible vein with changes in flow during the respiratory cycle, which is termed respiratory phasicity. Lower Extremity Arterial Doppler and Ankle­Brachial Index Studies these studies can also be useful in patients with suspected concomitant peripheral arterial disease. This is usually the case in patients with diminished or absent pedal pulses or patients with skin ulcers in unusual locations, especially if the ulcers are not healing or not responding to conventional compression therapy. In such instances, a diagnosis of significant peripheral arterial disease will significantly alter the management. Venography Venography was once the gold standard for diagnosing venous insufficiency and obstruction. However, it is no longer widely used due to its invasive nature and the associated nephrotoxicity that is seen with the administration of contrast material. In addition, the availability, reproducibility and low cost of duplex scanning has made the latter the imaging modality of choice for venous disorders. Thermal ablation is delivered via a laser or radiofrequency catheter that is inserted percutaneously into the saphenous vein at knee level or below-knee level and advanced up to 2­3 cm below the level of the saphenofemoral junction. Prior to delivering the heating energy, tumescent fluid is typically injected between the vein and the skin to prevent transmission of the heat to the overlying skin, which could cause a burn injury. The heat is then delivered and the catheter withdrawn from the groin to the insertion level to fully ablate the saphenous vein. Varicosities affecting the tributaries can be treated by sclerotherapy or foam sclerotherapy. Alternatively, they can be removed using a stab phlebectomy approach that can also be performed as an office-based procedure. Venous ulcers can also be treated conservatively with compressive bandages and frequent dressing changes. Leg elevation and the avoidance of prolonged standing are other essential components of the treatment. However, patients with refractory ulcers should be reassessed for the possibility of an associated significant superficial venous disease or significant associated arterial insufficiency. The arterial insufficiency may need to be addressed first in order to allow for the use of compression therapy. The superficial venous insufficiency can be addressed by thermal ablation of the saphenous veins or perforators that are leading to the non-healing ulceration. Management the management of chronic venous disease depends on the severity and location of the underlying venous pathology. For less severe symptoms, conservative management is warranted, including elevation of the legs, weight loss, compressive stockings and lifestyle modifications. In patients with varicose veins, the indication for treatment may be purely cosmetic. Alternatively, the symptoms may have been refractory to compression therapy and lifestyle modifications. Many patients live in hot climates and cannot tolerate wearing compression stockings, especially in the summer, or their job may demand prolonged standing and cannot be modified. Spider and reticular veins are typically treated by sclerotherapy or ablation using external laser beams or radiofrequency applications. In patients with large varicosities, it is important to determine whether the disease is involving the trunk (the great or small saphenous vein) or whether it is limited to the tributaries of the saphenous veins. The traditional treatment for great saphenous vein varicosities used to be surgical stripping of the saphenous vein from the ankle to the groin. This was then replaced by stripping from knee level to the groin to decrease the incidence of injury to the accompanying saphenous nerve. Similarly, the small saphenous vein used to be stripped from the ankle to the knee. Surgical stripping has now, however, been replaced with vein ablation that can be performed chemically or thermally as a same-day clinic procedure. Sclerotherapy is a form of chemical ablation that involves the injection of sclerosing agents into the vein. Patients may also present with pain in the lower extremity, mainly in the calf area or in the thigh along the course of the major veins. Most studies, however, have shown that this sign has very low sensitivity and specificity and can also be present with cellulitis, a haematoma or trauma. In such instances, the patient initially presents with a severely swollen painful extremity. As the thrombotic process extends into the branches of the veins and the capillaries, the arterial supply becomes also compromised, resulting in a cyanotic limb. The bluish, purplish discoloration of the lower extremity associated with pain and swelling is called phlegmasia cerulea dolens. Investigations should focus on identifying the risk factors that could predispose the patient to venous thrombosis, as mentioned above. A comprehensive physical examination, with more focus on the vascular system, should follow. In high-risk patients, on the other hand, D-dimer levels are unreliable, with 10 per cent falsenegative results. Other laboratory studies are important to rule out hypercoagulability; these include: · · · · · · · partial thromboplastin time; prothrombin time; platelet count and antithrombin level; factor V Leiden; methylene tetrahydrofolate reductase level; homocysteine concentration; protein C and S levels. Compression duplex ultrasonography is, however, less sensitive in low-risk patients and is often employed when the D-dimer assay is positive. Thoracic Outlet Syndrome 501 has a sensitivity and specificity of 90 per cent and 95 per cent, respectively. An alternative non-invasive imaging modality is ventilation/ perfusion lung scanning. Ventilation/perfusion scanning utilizes radionuclides and avoids ionizing radiation and nephrotoxic contrast material. However, it has a sensitivity of only around 40 per cent and is not useful in patients with existing lung disease. Thrombolysis and mechanical thrombectomy may also be utilized in cases of extensive iliofemoral vein thrombosis. Arterial compression may lead to distal embolization, arm pain or acute arterial thrombosis. Further thrombosis can be prevented by infusing unfractionated heparin and titrating it to reach a therapeutic activated partial thromboplastin time (1. Low molecular weight heparin has emerged as a leading therapeutic option as it allows for outpatient management and does not require frequent blood tests to check the anticoagulation level. It is also reported to be associated with a lower incidence of heparin-induced thrombocytopenia. Patients are also started on oral anticoagulation such as warfarin if their clinical condition permits, and this should be continued for at least 3 months. In patients who have a contraindication to anticoagulation, it may become necessary to insert an inferior vena cava filter. These include endovascular catheter-directed thrombolysis and mechanical thrombectomy. The scalene triangle is the most important anatomical space in the thoracic outlet. It is bounded anteriorly by the anterior scalene muscle, posteriorly by the middle scalene muscle and inferiorly by the superior border of the first rib. The anterior scalene muscle originates from the transverse processes of the C3­C6 vertebrae and inserts onto the anterior aspect of the first rib. The middle scalene muscle arises from the transverse processes of C2­C7 and inserts onto the posterior aspect of the first rib. The subclavian artery and brachial plexus pass through the scalene triangle while the subclavian vein courses anterior to it. These muscles can potentially hypertrophy or undergo fibrosis with repetitive motion or trauma, contributing to compression of the neurovascular structures. The costoclavicular space comprises the area between the first rib and the clavicle through which the brachial plexus, subclavian artery and subclavian vein pass. Congenital fibrocartilaginous bands usually extend from the tip of the rudimentary cervical rib to the first rib and compress the brachial plexus trunk. Ischaemia is usually the result of thromboembolization from a subclavian mural thrombus or post-stenotic subclavian aneurysm. In the Adson test (see below), the examiner feels the radial pulse while the patient is asked to rotate their head to the ipsilateral side with the neck extended and take a deep breath; a positive result, indicated by disappearance of the radial pulse, aids in the diagnosis but is non-specific. This reflects the compression of a specific structure, although more than one structure can be compressed, resulting in some overlap of the symptoms. Chest radiographs should always be taken to identify bony abnormalities such as a cervical rib or long transverse cervical process. The most common presentation is acute thrombosis of the axillary subclavian vein, also known as Paget­Schroetter syndrome, which is characterized by a sudden onset of swelling, pain and discoloration of the upper extremity. There may be tenderness over the scalene muscles or supraclavicular fossa on the involved side. Deep palpation of the scalene muscles may also elicit pain and paraesthesia in the affected limb. While the examiner is feeling the radial pulse, the patient is asked to rotate their head to the ipsilateral side with the neck extended and take a deep breath. Loss of a radial pulse during this test is, however, not specific and may occur in the presence or absence of neurogenic compression. The 90° abduction in external rotation stress test is a modification of the Adson test and is sometimes referred to as the elevated arm stress test. The upper limb tension test involves abduction of the arms to 90° with the elbows extended and wrists dorsiflexed. Each manoeuvre progressively increases the stretch on the brachial plexus; pain down the arm, especially around the elbow, and/or paraesthesia in the hand represents a positive response. Nerve conduction studies can be useful and may reveal a significant reduction in the amplitude of the sensory as well as motor potentials in the ulnar nerve. The medial antebrachial cutaneous nerve, which runs in close proximity to the T1 root distribution and innervates the skin of the anterior and medial surfaces of forearm, is usually involved as well. Other tests need to also be performed to rule out the possibility of a carpal tunnel syndrome, ulnar nerve entrapment syndrome or cervical spine pathology. It is mainly employed when a patient has signs and symptoms suggestive of arterial insufficiency or ischaemia and when surgical intervention is being contemplated. This includes minimizing repetitive strenuous motion and following exercise regimens to promote relaxation of the neck muscles and increase their range of motion. Anterior scalene block with local anaesthetic has been shown to relieve the symptoms by relaxing the anterior scalene muscle and alleviating tension on the brachial plexus. Surgical treatment such as resection of the first rib and anterior scalenectomy is reserved for patients who fail to improve or who develop progressive neurological weakness or disabling pain. If there is compression and narrowing of the vein at the costoclavicular junction, patients should undergo thoracic outlet decompression via a first rib resection and anterior scalenectomy. Angioplasty and stenting are reserved for persistent stenosis following surgical decompression. In addition, a work-up for hypercoagulability should be undertaken in conjunction with this to decide on long-term anticoagulation and follow-up. The diagnosis can be confirmed with duplex ultrasonography, which shows acute thrombosis of the axillary subclavian vein. Contrast venography is reserved for cases in which non-invasive tests are not conclusive or are unavailable. Severe ischaemia usually requires surgical embolectomy with or without thrombolysis. If the subclavian artery has a short affected segment, resection and primary anastomosis may be performed.

Syndromes

• Low level of one or more types of blood cells
• Abuse of drugs
• Chlorothiazide (Diuril, Diurigen)
• Low blood pressure
• Litcon
• Place the heel of one hand on the breastbone -- just below the nipples. Make sure your heel is not at the very end of the breastbone.

Assess the patency of the airway and rule out obstruction (troubled speech treatments for depression order trazodone, stridor) medications prescribed for anxiety best buy for trazodone. Bowel wall thickening (arrows) and haemoperitoneum (H) in the absence of a solid organ injury are consistent with an intestinal injury medications parkinsons disease purchase trazodone no prescription. Electrocardiography treatment 4 high blood pressure trazodone 100 mg purchase without a prescription, blood tests treatment ketoacidosis order trazodone cheap, urinary and gastric catheters, radiographs of the chest and pelvis, and abdominal ultrasonography are adjuncts to the primary survey. The presence and degree of the haemorrhagic shock depends on the percentage of blood volume lost: · Class I haemorrhage (up to 15 per cent). This may be associated with an increased pulse pressure but otherwise few symptoms. This leads to an increase in heart rate to above 100 beats per minute and a fall in pulse pressure; orthostatic hypotension may also be noted. A progressive tachycardia of greater than 120 beats per minute is now accompanied by supine hypotension. The resulting organ malperfusion manifests with diminished urine output and a decline in mental status. The skin is cool and clammy secondary to peripheral compensatory vasoconstriction. The tachycardia exceeds 140 beats per minute, profound hypotension is associated with a progression of organ failure, and the condition is immediately life-threatening. During the secondary survey, the patient is examined from head to toe and their past medical history obtained. Specific attention should be paid to open wounds, bruising, abrasions and deformities of the extremities. Entry and exit points of gunshot wounds are noted to establish an approximate trajectory. The abdomen is assessed for distention, which may be due to a large amount of blood or simply from ileus. Acute gastric dilatation may develop rapidly after trauma, produce significant abdominal distension, especially in children, and impede the examination. The abdomen is evaluated for signs of peritoneal irritation, which may be difficult to evaluate in unconscious patients. Digital rectal examination is indicated to evaluate the presence of blood (although a negative result does not rule out bowel injury) and the position of the prostate, as well as to assess the function of the external anal sphincter in spinal cord trauma. The haemorrhage from the abdominal injuries should be differentiated from cardiogenic and neurogenic shock and bleeding from other sources (intrathoracic, extremities). In the vast majority of cases, it has replaced diagnostic peritoneal lavage and pericardiocentesis. In addition, the clinician must always remember that surgical conditions may occur in a patient with medical disease. The cardinal signs of a surgical abdomen are the presence of rebound tenderness and involuntary guarding; these are absent in the conditions described below. Medical Causes of Acute Abdominal Pain 609 Ischaemic Heart Disease Ischaemic heart disease manifests with chest pain that is commonly associated with exercise or stress. The pain is usually described as a tightness, pressure or burning, and or as heartburn, frequently described as central and located behind the sternum. Sharp, stabbing pain, localized to a small area and exacerbated by palpation, movement or swallowing is atypical of a cardiac aetiology. Cardiac pain is sometimes reported in the C7­T4 dermatomes, typically the epigastrium, shoulders, arms and forearms (often the inner left forearm), neck and lower jaw, and rarely in between the scapulas. Such referred pain is usually described as a diffuse discomfort rather than a focal site. Referred epigastric pain associated with nausea occasionally simulates a peptic ulcer, cholecystitis or pancreatitis. Lead Colic the incidence of lead poisoning is decreasing due to the monitoring of work environments and the use of lead-free paints in construction. Chronic exposure leads to cognitive impairments in both adults and children and, with high doses, death. Acute lead intoxication presents with headache, muscle aches, arthralgias, anorexia and peripheral neuropathy (extensor weakness being common). Colicky abdominal pain (lead colic) and constipation may simulate an acute abdomen. Porphyria the porphyrias are a group of congenital metabolic disorders of haemoglobin metabolism. Cutaneous porphyrias present with photosensitivity and chronic blistering lesions on sun-exposed areas of skin. Acute porphyrias (specifically acute intermittent porphyria) present with acute intermittent attacks of non-specific neurovisceral symptoms and no cutaneous manifestations. The attacks may be precipitated by smoking, ingestion of alcohol, oestrogens, antiseizure medications or sulphonamides. The neurological symptoms include sensory and motor neuropathy, delirium and seizures. Persistent diffuse abdominal pain is the most common presenting symptom during acute attacks and is usually associated with ileus and abdominal distension. Remarkably, the voided urine is of normal colour but turns the colour of red wine after several hours of exposure to light. Pleural Inflammation Pleuritic chest pain is caused by irritation of the nerve endings supplying the parietal pleura. It is often described as stabbing and exacerbated by inspiration, coughing and palpation. Underlying viral and bacterial infections, pleural effusion, pneumothorax and autoimmune conditions (systemic lupus erythematosus, rheumatoid arthritis) may produce pleuritic pain. The lower intercostal nerves supply the abdominal wall, and pleuritic pain may be felt in the abdomen. The classic scenario is right lower lobe pneumonia with an effusion mimicking acute cholecystitis or appendicitis. Auscultation, percussion and palpation of the chest and abdomen, in addition to chest radiography, clarify the aetiology. Neurogenic and Musculoskeletal Pain Radiculopathy of the spinal nerves may be caused by degenerative disease of the spine, injuries, tumours and abscesses. Tenderness may be elicited by paraspinal or intercostal, rather than abdominal, palpation. A reactivation of latent varicella-zoster virus within the sensory dorsal root ganglia may occur years after the initial infection and results in herpes zoster, or shingles. Herpes zoster manifests with a painful, unilateral vesicular eruptions localized to the area of the affected thoracic or lumbar dermatomes. Acute neuritis with a burning and throbbing pain, and the characteristic hyperaesthesia, may precede the onset of the rash by days or weeks, and may simulate intra-abdominal disease. Pain related to costochondritis may be confused with upper abdominal pain and may be differentiated by superficial palpation of the costal margins. Acute muscle strain from vigorous physical activity in fit individuals or chronic strain from increased intra-abdominal pressure in obese patients may also present with abdominal pain. Sickle Cell Disease Sickle cell disease is a hereditary disorder resulting in an abnormal haemoglobin structure (haemoglobin S). The manifestation and severity of the disease depend on the genotype and on the coexistence of thalassaemia. The heterozygote condition (sickle cell trait) is associated with milder clinical symptoms and provides some protection against severe malaria infection. This explains the origin and high prevalence of this genetic mutation in Mediterranean, African and Middle Eastern countries. Abnormal haemoglobin is prone to polymerization on deoxygenation, which causes the red blood cells to lose the normal shape and pliability that are necessary for their normal flow through small vessels. Chronic haemolytic anaemia produces jaundice, calcium bilirubinate gallstones, splenomegaly and poorly healing pretibial ulcers. The result of the impaired blood flow and complex pathophysiology is vaso-occlusion. This causes recurrent episodes of acute ischaemic pain (sickle cell crises) and leads to a variety of systemic complications and organ failures. The form of the disease determines the frequency of the episodes, which is approximately once per year. Acute painful episodes, lasting hours to days, may be precipitated by stress, infection, dehydration, the onset of menses, weather fluctuations, smoking or alcohol consumption. Many of the attacks have no definitive cause and are not associated with increased haemolysis. Diabetic Ketoacidosis Nearly half of all patients presenting in diabetic ketoacidosis have nausea, vomiting and abdominal pain. The pain typically resolves with resolution of the ketoacidosis, and if the pain persists an additional work-up is needed. Severe abdominal pain may be part of an acute crisis or a resulting abdominal complication. The mesenteric vessels may be affected, and ischaemic pain mimics an acute surgical abdomen. Right upper quadrant pain may result from vascular occlusions in the liver or symptomatic pigmented gallstones. An initial splenomegaly in childhood, with repeated splenic infarctions, evolves into autosplenectomy. Henoch­Schönlein Purpura Henoch­Schönlein purpura is an uncommon self-limiting condition associated with IgA immune complexes. The disease is more common in boys, and in half of all cases is preceded by an upper respiratory infection. All patients have purpura, most have arthritis and approximately half have glomerulonephritis and abdominal pain. The manifestations evolve over a period of days to weeks, usually beginning with development of the diagnostic palpable lower extremity and buttock purpura, or large joint arthritis without effusion. The presentation may vary, with a quarter of patients initially presenting with colicky abdominal pain, nausea, vomiting and frequently bloody stools. The abdominal pain may be very severe, simulating an acute abdomen; however, the pain is often incompatible with the examination findings and is diffuse rather than localized, and signs of peritoneal irritation are generally uncommon. In addition, mucosal oedema and haemorrhage may serve as a lead point and result in small bowel intussusception in some of these patients. Millions of people living and visiting endemic areas are affected annually, and this diagnosis should be suspected in exposed individuals presenting with a febrile illness. The acute illness manifests with fever, chills, arthralgias and myalgias, vomiting, abdominal pain and diarrhoea. Splenomegaly may develop after several days of illness in non-immune individuals and may be chronic in individuals living in endemic areas. However, never ignore any symptoms and risk the well-being of patients presenting with an uncommon manifestation of an unsuspected disease. Patients demonstrating malingering consciously simulate symptoms of illness for the reason of an external incentive: financial gain or the avoidance of criminal prosecution, for example. In factitious disorders, patients also produce symptoms and signs intentionally, but with an unconscious motivation and no objective or response to external incentives. These individuals frequently have some medical knowledge and present with non-healing wounds, self-induced infections, hypoglycaemia, bleeding, gastrointestinal disorders and various other problems. Such patients persistently submit themselves to surgery and invasive procedures for the condition they simulate. Surgeons most commonly face patients simulating an acute abdomen or bleeding, or manipulating for treatment using the presence of foreign bodies. Such behaviour causes direct bodily harm and also exposes these individuals to the risk of iatrogenic complications. Patients may have previous scars and a long convoluted history of medical care in various institutions. Patients may be unwilling to allow contact with family members or previously seen physicians. Examination may be difficult due to the skilled faking of signs of peritoneal irritation. Vital signs, close observation and laboratory tests may help to reveal the discrepancies. These conditions are a major public health problem and are associated with variable degrees of psychiatric and social impairment. In a variety of somatoform disorders (pain disorder, hypochondriasis and others), patients do not produce their symptoms consciously or intentionally. A thorough history and physical examination of the patient are of paramount importance in making the correct diagnosis. The prompt diagnosis of an acute surgical abdomen and the recognition and correction of physiological derangements will save lives. Any intestinal obstruction should be approached from the position of whether bowel ischaemia is present or threatened. While the overdistended, bean-shaped loop seen in caecal volvulus characteristically points towards the left upper quadrant, and the one of sigmoid volvulus towards the right upper quadrant, their differentiation may be difficult based on physical examination and plain radiographs alone. Unlike with small bowel obstruction, post-operative adhesions are a very rare cause of colonic obstruction. Pathology of the internal reproductive organs should always be on the list of differential diagnoses in females with abdominal pain regardless of their age. Right lower quadrant guarding and rebound tenderness usually develop within the first day of onset of the symptoms. The sigmoid colon may, however, loop to the right side and the diverticulitis may then mimic acute appendicitis.

On contrast studies symptoms 2 dpo buy trazodone 100 mg with mastercard, this causes contrast-filled outpouchings extending from calyces treatment zone tonbridge trazodone 100 mg online, described as a ball-on-tee appearance treatment 02 bournemouth trazodone 100 mg on line. Bilateral retrograde pyelograms demonstrate multifocal papillary necrosis (arrows) medicine in the civil war 100 mg trazodone amex. A triangular radiolucent filling defect (arrowhead) is noted in the right renal pelvis medications after stroke discount trazodone 100 mg buy on-line. A, Intravenous urography shows an elongated lucent filling defect (arrow) in the left ureter due to a blood clot in this patient with gross hematuria from a bleeding renal pseudoaneurysm. B, Noncontrast computed tomography in a different patient who has hemophilia and gross hematuria shows high-attenuation blood clot (arrow) in the lower right ureter. Fungal debris or fungus balls can lead to filling defects in the calyces or ureter. The filling defects caused by blood clots or fungal debris within calyces have often been described as the hand-in-glove appearance. Blood and fungal debris tend to conform to the shape of their surroundings, and a thin rim of contrast material in the calyces will outline this radiolucent material. Infectious debris or frank pus has a similar appearance, mimicking blood or fungal debris. Clinical symptoms and urine cultures are essential for establishing the correct diagnosis. These are most commonly seen as a normal variant in patients with urinary conduit diversions. Typically, ileal conduits allow ureteral reflux, and air bubbles can be refluxed into the ureter or renal collecting systems. In other cases, instrumentation or a fistula to the bowel or to the skin can introduce air bubbles. Finally, air bubbles can be introduced into the ureter or collecting system from a gas-producing infection. The organisms responsible are strains of Escherichia coli, Proteus, Klebsiella, and some strains of fungus. This type of infection, termed emphysematous pyelitis, can generally be treated successfully with systemic antibiotics in conjunction with urinary decompression through either retrograde ureteral stenting or percutaneous nephrostomy drainage. Edema of the mucosa is usually caused by direct irritation, either by passage of a stone or by iatrogenic insult to the ureter. Edema may lead to focal mucosal blisters with a bullous appearance, or may be somewhat striated, causing linear filling defects. Removal of the inciting factor, such as a stone or stent, usually results in resolution of the edema within several days or weeks. This premalignant squamous metaplasia of the urothelium results from chronic irritation of the urinary lining. Leukoplakia most commonly involves the bladder but may involve the ureter or renal collecting system. This intravenous urogram demonstrates another radiographic appearance of papillary necrosis. Here the peripheral margins of the papilla have necrosed and sloughed, leading to cavities at the papillary tips of the calyces. This causes elongation of the edges of the calyces, leading to a lobster-claw appearance. B, Computed tomography urography in a different patient shows focal contrast-filled outpouching (arrow) extending from a calyx, typical of papillary necrosis with a ball-on-tee configuration. This shape indicates soft pliable material, which is typically infectious debris, pus, or blood. This was sampled and found to be fungal infection and debris in this immunocompromised patient. When leukoplakia is discovered, squamous cell carcinoma of the urothelium usually coexists in an adjacent area of the urinary tract. Ureteritis cystica and pyeloureteritis cystica are rather common postinflammatory causes of filling defects in the urinary tract. These sterile submucosal fluid collections are caused by intramural inflammation and lead to encystment and submucosal extension of transitional epithelium. Computed tomography shows gas bubbles (black arrows) in calyces in this patient with a gas-producing infection and an obstructing ureter stone (white arrow). There is no gas in the renal parenchyma excluding the diagnosis of emphysematous pyelonephritis. The excretory phase of a computed tomography urography in a patient with an ileal urinary conduit and chronic urinary infections shows tiny nonenhancing low-attenuation filling defects (arrows) in both ureters typical of ureteritis cystica. Malacoplakia is a rare but often discussed intramural ureteral lesion that occurs secondary to chronic urinary tract infection. These plaquelike, intramural lesions are caused by buildup of defective macrophages. Microscopic evaluation of the defective macrophages will reveal incompletely phagocytized E. The intracellular inclusion bodies containing these bacteria are known as Michaelis-Gutmann bodies and are diagnostic of malacoplakia. Malacoplakia can involve the bladder, ureter, collecting system, and even the renal parenchyma. These lesions tend to regress spontaneously after resolution of the inciting urinary tract infection. Some authors have compared malacoplakia with a localized form, or forme fruste, of chronic granulomatous disease, another entity with defective macrophage phagocytosis. Endometriosis and schistosomiasis typically lead to strictures of the ureter rather than filling defects. However, both can invade the ureteral wall and lead to focal filling defects impinging on the ureteral lumen. Both entities tend to involve the pelvic ureter; schistosomiasis involves the ureter adjacent to the bladder, and endometriosis involves the ureter adjacent to the uterotubal ligaments, several centimeters away from the bladder. Detection of an associated bladder abnormality should suggest schistosomiasis, and typical clinical findings of cyclical pelvic pain are generally present in patients with endometriosis involving the ureter. This intravenous urogram demonstrates multiple eccentric indentations on the upper ureter in a patient with severe left renal artery stenosis. These indentations are due to enlargement of ureteric vessels, which serve as collaterals to increase blood flow to the kidney. These veins and arteries enlarge in patients with renal artery stenosis, hypervascular renal tumors such as renal cell carcinomas or arteriovenous malformations, or occlusive aortoiliac or venous diseases. Testicular or ovarian vein varices, ovarian vein syndrome, or thrombophlebitis of the gonadal veins can lead to vascular impressions on the ureteral lumen. Ureteral and renal pelvic injuries account for less than 1% of all urologic traumas. Unlike other areas of the urinary tract, penetrating injury is the most common mechanism causing ureteral injury. Penetrating injury can lacerate or transect the ureter at any site along its course. Findings indicative of ureteral laceration are urinoma formation, contrast extravasation, and discontinuity of the ureter. A, Computed tomography urography shows a urinoma with leak of contrast-enhanced urine (arrow) into the perirenal fluid collection. There are normal calyces without hydronephrosis and there is normal urine excretion in the kidney. More interesting than penetrating injury is ureteral injury as a result of acceleration or deceleration trauma. When ureteral injury results from this type of trauma, ureteral avulsion usually results. Interestingly, ureteral avulsion occurs approximately three times more often in children than in adults. In addition, avulsion occurs three times more commonly on the right than on the left. Ureteral avulsion appears to be caused by sudden hyperextension of the body due to sudden acceleration or deceleration. This effect forces the collecting system to snap against the spine and this may cause ureteral avulsion. This mechanism of injury helps to explain the increased incidence of this type of injury in children. Diagnosing ureteral avulsion is relatively straightforward when it is an isolated injury. For instance, severe renal damage may lead to underexcretion of contrast material and a lack of urinoma formation. Ureteral avulsion can be definitively diagnosed with selective retrograde pyelography when contrast material extravasation occurs and discontinuity of the ureter is evident. Ureteral avulsion may be incomplete, and in these cases, the ureter may heal if it is stented in a timely fashion. In conjunction with stenting, percutaneous urinoma drainage will encourage rapid healing and lessen the risk of ureteral cicatrization. One additional clinical point about ureteral avulsion is the fact that hematuria may be absent in up to 30% of patients with this type of injury. Can noncontrast helical computed tomography replace intravenous urography for evaluation of patients with acute urinary tract colic Radiological patterns of mineralization as predictor of urinary stone etiology, associated pathology, and therapeutic outcome. Ureteral dilatation in children with febrile urinary tract infection or bacteriuria. Ureteric obstruction secondary to endometriosis: report of three cases with a review of the literature. Multiple ureteral diverticula: a possible radiographically demonstrable risk factor in development of transitional cell carcinoma. Is there a learning curve phenomenon in diagnosing a ureteral calculus with non-contrast helical computed tomography Congenital ureteric diverticula in children and adults: classification, radiological and clinical features. Synchronous and metachronous transitional cell carcinoma of the urinary tract: prevalence, incidence, and radiographic detection. Diseases of the lower urinary tract are prevalent and can be potentially debilitating from a medical and a social point of view. The bladder is the most common site of urinary tract infection in women of reproductive age. Symptoms referable to bladder-outlet obstruction are among the most common reasons why elderly men are examined by internists and urologists. Traumatic injury to the lower urinary tract or management of such an injury may lead to incontinence or impotence or both. Urinary incontinence may lead not only to skin breakdown and soft-tissue infection but also to social isolation. This chapter presents a practical review of the imaging of common diseases of the bladder and urethra. The first section reviews normal embryology, anatomy, and physiology of the lower urinary tract. The second section briefly reviews urodynamic tests and radiologic protocols used in imaging the bladder and urethra. The third and fourth sections discuss the pathologic 190 conditions that can affect the bladder and urethra, respectively. To the extent possible, this discussion is presented in a radiographic pattern-oriented approach (Boxes 6-1 and 6-2). The diseases of the lower urinary tract are presented in a manner that reflects the way practicing radiologists confront disease, that is, as one or more radiographic signs. At this stage, the urogenital sinus can be divided into the bladder proper, a urethral part, and a phallic part. The bladder is continuous with the allantois through the urachus, which is the tapered, cephalad portion of the urogenital sinus. The urethral part of the urogenital sinus gives rise to most of the female urethra and to the prostatic and membranous portions of the male urethra. The prostate gland and the female urethral and paraurethral glands develop as evaginations from the urethral part of the urogenital sinus. The phallic part of the urogenital sinus eventually forms the penile urethra in males and a small portion of the urethra and vestibule in females. The mesonephric ducts and ureteric buds develop separate connections with the urogenital sinus through progressive resorption of the caudal segment of the mesonephric duct. During this process, the openings of these two ductal systems switch craniocaudally so that the ureters enter more cranially than do the mesonephric ducts. The mucosa of the bladder formed by incorporation of these ducts becomes the trigone. Anatomy of the Bladder the surface anatomy of the urinary bladder consists of an apex, a superior surface, two inferolateral surfaces, a base or posterior surface, and a neck. The apex of the bladder ends as the median umbilical ligament (obliterated remnant of the urachus). The superior surface of the bladder is the only surface that is covered by the peritoneum. This is important to remember when characterizing bladder injuries, discussed later in the chapter. The constituents of the bladder wall from lumen outward are the mucosa (composed of transitional epithelium or urothelium), the submucosa or lamina propria, the muscular layer, and the serosa or adventitia. The normal urothelium rarely is more than seven to eight cell layers thick and has the capacity to change shape and alignment to accommodate extremes of bladder volume. The bladder wall often is described as having three muscular layers, but this description is true only around the bladder neck.

This finding usually prompts urgent intervention medications drugs prescription drugs order genuine trazodone online, either renal arteriography with embolization or surgical exploration medications list a-z generic trazodone 100 mg otc. A medicine 018 purchase trazodone online pills, Enhanced axial computed tomography image at the level of the kidneys treatment 2 stroke order genuine trazodone on line, obtained at the time of acute traumatic injury treatment erectile dysfunction order trazodone 100 mg with amex, shows a reasonably well-defined area of decreased attenuation in the interpolar right kidney (arrows). B, An image obtained at the same level 1 week later shows normal perfusion of the involved region without any parenchymal changes. The selflimited nature of the findings is consistent with renal parenchymal contusion. Enhanced axial (A) and sagittal (B) reconstructed images obtained at the time of acute traumatic injury show a linear defect in the lower pole of the right kidney, consistent with a parenchymal laceration (arrow in A and B). The associated subcapsular hematoma and perinephric bleeding are better illustrated in B (arrowhead). Fractures are more severe than limited lacerations, and patients with renal fractures tend to be hemodynamically unstable. The choice of treatment for these patients depends on clinical status, and in particular, the integrity of the renal vasculature. With imaging techniques, a renal fracture appears similar to a renal laceration, but with more numerous defects. In the stable patient, selective renal arteriography may be useful to evaluate the integrity of the renal vasculature, with the possibility of embolizing small arteries that are actively bleeding. Patients with this severe type of injury are usually hemodynamically unstable, and the kidney damage is extensive and irreversible. Nephrectomy is generally indicated to prevent critical bleeding from the injured renal artery branches. As with other renal injuries, evaluating other abdominal organs in patients with shattered kidneys is crucial. The force to the retroperitoneum that is necessary to shatter a kidney usually results in injuries to other abdominal organs. Particularly susceptible organs are the spleen, liver, and pancreas because they are located in the same region. An enhanced axial computed tomog- raphy image through the kidneys shows a parenchymal injury in the right kidney that extends from the lateral margin through the renal hilum, centrally, creating separate anterior and posterior portions of the renal parenchyma. In these circumstances, a single abdominal film is obtained 10 to 15 minutes after the injection of contrast material. This injury is usually associated with deceleration-related blunt-type injuries that result in transection or dissection of the main renal artery or the renal vein. Patients with these injuries usually present with hypotension and evidence of massive hemorrhage. If the diagnosis is made rapidly, within 3 to 6 hours of the injury, surgical revascularization of the affected kidney may be attempted. Any evidence of diminished nephrogram in a trauma patient should raise the possibility of decreased blood flow to the kidney, possibly the result of a renal vascular pedicle injury. Enhanced axial computed tomography image through the mid right kidney (A) and an image through the right lower renal pole (B) reveal numerous linear defects that have created a large number of parenchymal fragments, many separated by intervening hematoma, consistent with a shattered kidney. This degree of parenchymal injury often requires urgent nephrectomy to control blood loss, as was the case in this patient. The rim nephrogram results from persistent perfusion of the outermost rim of the renal cortex through the renal capsular artery. The capsular artery branches off very early from the renal artery and is rarely affected by renal artery transection. Finally, renal angiography is useful in the diagnosis of renal vascular pedicle injury. Arteriography usually demonstrates active renal artery bleeding or renal artery occlusion resulting from transection and thrombosis. An enhanced axial computed tomography image through the kidneys obtained after blunt traumatic injury shows absence of perfusion in the left kidney. The proximal left renal artery is opacified, but there is abrupt truncation of the contrast in the mid renal artery (arterial cutoff sign) due to traumatic dissection with luminal obstruction (arrow). Although revascularization of this kidney was attempted due to the young age of this patient, it was not successful. If left untreated, renal artery bleeding can recur and may result in severe hemorrhage. Kidney dimensions at sonography: correlation with age, sex and habitus in 665 adult volunteers. Acquired cystic disease of the kidneys: computed tomography and ultrasonography appraisal in patients on peritoneal and hemodialysis. A comparative study of methods of estimating kidney length in kidney transplantation donors. Renal artery stenosis: analysis of Doppler waveform parameters and tardus-parvus pattern. Evaluation and management of atherosclerotic renal vascular disease to prevent end-stage renal failure. The ureteral bud arises from the mesonephric duct early in gestation and forms the ureter, pelvicalyceal system, and renal collecting tubules. A physical association between the ureteral bud and the metanephric blastema, the primordium of renal parenchyma, is necessary for development of the kidney and the calyces. Differentiation of the metanephric blastema into renal parenchyma is dependent on induction by the ureteral bud; so, too, is the ureteral bud branching dependent on induction by the metanephric blastema. If all goes well, the pelvocalyceal system and the ureter develop into tubular conduits for urine with approximately 10 to 25 calyces for each kidney. The transitional epithelium and the supporting connective tissue constitute the mucosa of the ureter. The mucosa is surrounded by the muscularis layer, which is made up of smooth muscle with both longitudinal and circular fibers. The outermost lining of the normal ureter is the adventitia, which is composed of connective tissue. The nephrogram phase is for renal mass and urothelial evaluation and characterization. Finally, the excretory phase is obtained to detect urothelial thickening and intraluminal masses. A, Precontrast scan; B, scan during the second phase, which combines the nephrogram and excretory phases of contrast enhancement. The excretory phase is also highly sensitive for the detection of ureteral tumors, which will appear as filling defects or wall thickening in the opacified and distended collecting system or ureter. Furosemide should be avoided in patients with very low blood pressure, or with allergies to this drug. A, During the corticomedullary phase (60-second delay) the right kidney appears normal. A B avid enhancement (arrow) of the right ureter, typical of a urothelial carcinoma. B, During the excretory phase, the tumor (arrow) is seen as a filling defect in the contrast-filled ureter. Because it is part of a comprehensive examination including evaluation of the bladder and kidneys, it has advantages over retrograde urography. It is the best imaging test currently available for evaluation of hematuria and for evaluation of many other urinary tract disorders. Very little, if any, renal sinus fat is present at birth, whereas approximately 20% of total renal volume is due to renal sinus fat in the adult. With aging, fat proliferates in the renal sinus to compensate for atrophy of the renal parenchyma. Fatty proliferation that leads to mass effect on the intrarenal collecting system is usually referred to as renal sinus lipomatosis (Box 5-1). This mass effect manifests radiographically as thinning and stretching of the infundibula resulting in a spidery appearance of the collecting system. The normal constituents of the renal sinus are the intrarenal collecting system, renal blood vessels, lymphatics, and nerve fibers, as well as fat and varying quantities of fibrous tissue. Besides lesions contained within the intrarenal collecting system, such as stones, and lesions arising from the collecting system, such as urothelial tumors, significant disease of the renal sinus is unusual. A, During the nephrogram phase, there is avid enhancement (arrow) of the left ureter, typical of a urothelial carcinoma. The ureter is redundant resulting in overlapping with normal ureter just anterior to the tumor. B, During the excretory phase, the tumor is seen as circumferential wall thickening (arrow). C, Retrograde pyelogram shows irregular narrowing (arrow) in this area corresponding to the infiltrating carcinoma. While renal sinus lipomatosis is commonly seen in elderly individuals due to renal parenchymal atrophy, fatty proliferation can also be accelerated in patients with increased exogenous or endogenous steroids. In these patients, the volume of atrophied renal parenchyma is replaced with a similar volume of renal sinus fat. Radiographically, replacement lipomatosis appears as a massive overgrowth of the renal sinus in association with marked thinning of the renal parenchyma. The proliferation of renal sinus fat, which is dispersed throughout the renal sinus, leads to attenuation and stretching of the collecting system without a dominant focal area of mass effect. This contrast-infused computed puted tomography shows a combination of renal atrophy with exuberant fat proliferation in the renal sinuses. This patient has chronic renal infections that cause the kidney atrophy and the unusual massive fatty replacement that effaces the calyces. In addition, there is extensive retroperitoneal lymphadenopathy in this patient with lymphoma. These fluid-containing cysts are thought to be congenital, lymphatic in origin, and usually asymptomatic. Occasionally, these cysts can lead to focal hydronephrosis, which necessitates cyst drainage and sclerosis. Parapelvic cysts are simple renal cysts arising in the medial renal parenchyma that protrude into the renal sinus. Despite their similar location in the renal pelvis, their origin appears to be different from that of peripelvic cysts. Diagnostically, parapelvic cysts should meet all the radiologic criteria for simple cysts elsewhere in the kidney. A, Longitudinal sonogram of the right kidney in this patient demonstrates normal renal parenchyma. Several cystic areas are seen in the lower pole of the kidney (arrows), and other cystic areas were seen elsewhere in the renal sinus. B, A urogram in the same patient demonstrates stretched and attenuated calyces bilaterally with an appearance described as a spidery collecting system. Taken in conjunction with the sonogram these studies are diagnostic of peripelvic cysts. A, A cone-down view of the right kidney from a urogram demonstrates splaying of calyces and compression of the renal pelvis suggestive of a mass. B, A longitudinal sonogram of the right kidney in this patient confirms a simple cyst protruding into the renal sinus. Urinomas are usually associated with ureteral obstruction secondary to stone disease with resulting collecting system rupture. Occasionally, renal sinus urinomas may result from trauma causing collecting system laceration. Extravasated urine usually diffuses throughout the renal sinus and into the perinephric space without causing a dominant uriniferous cyst. Occasionally a focal urinoma can develop, but spontaneous resolution usually occurs with adequate decompression of the urinary tract, and additional treatment is rarely required. Renal Sinus Masses Vasculopathic processes that involve the renal sinus include renal artery aneurysms and arteriovenous malformations. These lesions often arise in or protrude into the renal sinus, leading to mass effect. Endovascular treatment can be performed with catheter-introduced embolic materials to occlude aneurysms or vascular malformations. Most neoplasms involving the renal sinus do so by secondary invasion (Box 5-3) because primary neoplasms of the renal sinus are rare. Renal parenchyma neoplasms such as renal cell carcinoma commonly extend into the renal sinus and lead to focal hydrone- phrosis or calyceal displacement. These lesions can be readily diagnosed with cross-sectional imaging, and their true site of origin is usually not in doubt. This tumor has a bimodal peak of incidence, occurring predominately in young male children and middle-aged women. This cystic lesion has numerous thick septa and it arises from the renal parenchyma. A contrast-infused computed tomography scan in this patient with known non-Hodgkin lymphoma demonstrates a retroperitoneal mass arising adjacent to the aorta and spreading into the right perinephric space. The mass has insinuated itself into the renal sinus and has replaced or obliterated normal renal sinus components. Finally, neoplasms arising primarily in the renal sinus are rare but include benign tumors such as angiomyolipoma, hemangioepithelioma, and teratoma, as well as tumors, both benign and malignant, arising from mesenchymal tissue. These mesenchymal tumors may originate from smooth muscle, fat, fibrous tissue, or nerve fiber. Mesenchymal tumors arising in the renal sinus appear identical to those arising elsewhere. There is soft-tissue mass infiltrating the upper right ureter in this patient with non-Hodgkin lymphoma. A, Axial computed tomography shows the mass extending along the renal pelvis and ureter.

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