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| erythema induratum ： ウィキペディア英語版 |
erythema induratum
Bazin disease (or "Erythema induratum") is a panniculitis on the back of the calves.
It was formerly thought to be a reaction to the tuberculum bacillus. It is now considered a panniculitis that is not associated with a single defined pathogen.
It occurs mainly in women, but is very rare now.
==Pathophysiology==
Predisposing factors include abnormal amount of subcutaneous fat, thick ankles and abnormally poor arterial supply. Abnormal arterial supply causes low-grade ischemia of ankle region. The ankle skin becomes sensitive to temperature changes. When weather is cold, ankle is cold, blue and often tender. In hot weather, ankle becomes hot, edematous, swollen and painful. Chilblains may be present. On palpation, small superficial and painful nodules are felt. They break down to form small and multiple ulcers. Fresh crops of nodules appear in periphery of ulcer and ultimately break down. In nodular stage, pain is present; while it subsides in ulcerative stage.
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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