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Proliferating angioendotheliomatosis has historically been divided into two groups, (1) a reactive, involuting type and (2) a malignant, rapidly fatal type.〔James, William; Berger, Timothy; Elston, Dirk (2005). ''Andrews' Diseases of the Skin: Clinical Dermatology''. (10th ed.). Saunders. ISBN 0-7216-2921-0.〕 The reactive involuting type is uncommon and occurs in patients with various diseases including subacute bacterial endocarditis and end-stage atherosclerotic disease. Patients present with various skin lesions and rashes - mostly commonly on the thighs. Treatment aimed at the underlying condition hastens the resolution of the lesions. The malignant type is an intravascular lymphoma, usually of the diffuse B-cell type. It progresses rapidly through involvement of multiple body systems and mortality occurs in less than a year from the initial diagnosis. The average age of patients newly diagnosed is 55 years. Currently the causative mechanism is unknown. In a few cases treatment with palliative chemotherapy has been effective.〔 == Classification == Proliferating angioendotheliomatosis may be divided into the following types: : * Reactive angioendotheliomatosis : * Malignant angioendotheliomatosis 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Proliferating angioendotheliomatosis」の詳細全文を読む スポンサード リンク
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