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sarcoidosis
(sahr″koi-do´sis)
a chronic, progressive, generalized granulomatous reticulosis that may affect any part of the body but most frequently involves the lymph nodes, liver, spleen, lungs, skin, eyes, and small bones of the hands and feet. It is characterized by the presence in all affected organs or tissues of epithelioid cell tubercles that later become converted into featureless hyaline fibrous tissue.
cardiac sarcoidosis
involvement of the heart in sarcoidosis, with lesions ranging from a few asymptomatic granulomas to widespread infiltration
of the myocardium by large masses of sarcoid tissue; it is characterized by a high incidence of atrioventricular block as well as right bundle branch block and ventricular arrhythmias.
muscular sarcoidosis
sarcoidosis involving the skeletal muscles, with sarcoid tubercles, interstitial inflammation with fibrosis, and disruption
and atrophy of the muscle fibers.
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