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Wiskott–Aldrich syndrome : ウィキペディア英語版
Wiskott–Aldrich syndrome

Wiskott–Aldrich syndrome (WAS) is a rare X-linked recessive disease characterized by eczema, thrombocytopenia (low platelet count), immune deficiency, and bloody diarrhea (secondary to the thrombocytopenia). It is also sometimes called the eczema-thrombocytopenia-immunodeficiency syndrome in keeping with Aldrich's original description in 1954. The WAS-related disorders of X-linked thrombocytopenia (XLT) and X-linked congenital neutropenia (XLN) may present similar but less severe symptoms and are caused by mutations of the same gene.
==Signs and symptoms==
The disease occurs only in males. The first signs of WAS are usually petechiae and bruising, resulting from a low platelet count. Spontaneous nose bleeds and bloody diarrhea are common. Eczema develops within the first month of life. Recurrent bacterial infections develop by three months. Enlargement of the spleen is not an uncommon finding. The majority of WAS children develop at least one autoimmune disorder, and cancers (mainly lymphoma and leukemia) develop in up to a third of patients.
Immunoglobulin M (IgM) levels are reduced, IgA and IgE are elevated, and IgG levels can be normal, reduced, or elevated.

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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