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Aschoff body
In medicine, Aschoff bodies are nodules found in the hearts of individuals with rheumatic fever. They result from inflammation in the heart muscle and are characteristic of rheumatic heart disease. These nodules were discovered independently by Ludwig Aschoff and Paul Rudolf Geipel, and for this reason they are occasionally called Aschoff-Geipel bodies.
==Appearance==
Microscopically, Aschoff bodies are areas of inflammation of the connective tissue of the heart, or focal interstitial inflammation. Fully developed Aschoff bodies are granulomatous structures consisting of fibrinoid change, lymphocytic infiltration, occasional plasma cells, and characteristically abnormal macrophages surrounding necrotic centres. Some of these macrophages may fuse to form multinucleated giant cells. Others may become Anitschkow cells or "caterpillar cells", so named because of the appearance of their chromatin.
They are pathognomic foci of fibrinoid necrosis found in many sites, most often the myocardium. Initially they are surrounded by lymphocytes, macrophages, and a few plasma cells, but they are slowly replaced by a fibrous scar. Aschoff bodies are found in all the three layers of the heart, least chance in the pericardium.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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