Sjögren Syndrome
79. Sjögren Syndrome Definition Sjögren syndrome is a complex disorder in which exocrine organs are infiltrated by lymphocytes. It is characterized by sicca symptoms and is frequently associated with systemic…
Stevens-Johnson Syndrome
80. Stevens-Johnson Syndrome Definition Stevens-Johnson syndrome (SJS) is a hypersensitivity disorder mediated by immune-complex formation. It is a potentially fatal systemic disorder that is a severe type of erythema multiforme….
Scleroderma
77. Scleroderma Definition “Scleroderma” literally means “hard or thickened skin.” The disease is a multisystem disorder characterized by inflammation, tissue fibrosis, and microvascular occlusion as the result of excessive production…
Sarcoidosis
76. Sarcoidosis Definition Sarcoidosis is a chronic multisystem inflammatory disease characterized by noncaseating granulomas as well as lymphocytic alveolitis. Incidence In the United States the overall incidence of sarcoidosis ranges…
Pyelonephritis
74. Pyelonephritis Definition Pyelonephritis is a potentially organ-threatening, fatal inflammation of the kidney and renal pelvis secondary to a bacterial infection that begins in the interstitial tissues and rapidly extends…
Portal Hypertension
70. Portal Hypertension Definition Portal hypertension is the presence within the portal circulation of a pressure gradient of 12 mm Hg or higher. This malady is associated with numerous conditions…
Pemphigoid/Pemphigus
68. Pemphigoid/Pemphigus Definition Pemphoigoid and pemphigus are a group of chronic, autoimmune blistering diseases that are classified depending on the tissue predominately involved. Cicatricial pemphigoid (CP) predominately affects the mucous…
Polyarteritis Nodosa
69. Polyarteritis Nodosa Definition Polyarteritis nodosa (PAN) is a rare form of systemic necrotizing vasculitis that primarily affects small and medium-sized arteries without glomerulonephritis or vasculitis in the arterioles, capillaries,…
Paget’s Disease of the Bone
67. Paget’s Disease of the Bone Definition Paget’s disease of the bone is a relatively common disease of middle-aged and elderly people in which there is excessive and abnormal bone…
Osler-Weber-Rendu Syndrome
64. Osler-Weber-Rendu Syndrome Definition Osler-Weber-Rendu syndrome (OWRS) is an autosomal dominant, inherited disorder characterized by telangiectases, recurrent epistaxis, and first-degree relative(s) positive for the disorder. Telangiectases are lesions produced by…
