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要旨●皮膚病変を呈する代表的な消化管ポリポーシスについて概説した.消化管ポリポーシスのうち,家族性大腸腺腫症(FAP),Peutz-Jeghers症候群(PJS),Cowden症候群(CS),Cronkhite-Canada症候群(CCS),若年性ポリポーシス/遺伝性出血性末梢血管拡張症複合症候群(JPs-HHT)には特徴的な皮膚病変が出現する.FAPでは類表皮囊胞や脂肪腫,PJSでは四肢末端と口唇・口腔内粘膜の色素斑,CSでは顔面丘疹,口腔内乳頭腫と四肢末端の角化性皮疹,CCSでは脱毛,爪甲異常や皮膚の色素沈着,JPs-HHTでは皮膚粘膜の毛細血管拡張が代表的な皮膚病変である.消化管ポリポーシスでは消化管外徴候を伴う疾患が多く,皮膚・粘膜病変の診察所見が診断契機となる場合もあるため,これらの所見を熟知しておくことが重要である.
Here the clinical features of GI(gastrointestinal)polyposis syndromes that can manifest as mucocutaneous lesions have been described. Among GI polyposis syndromes, FAP(familial adenomatous polyposis), PJS(Peutz-Jeghers syndrome), CS(Cowden syndrome), CCS(Cronkhite-Canada syndrome), and JPs-HHT(juvenile polyposis-hereditary hemorrhagic telangiectasia)overlap syndrome are frequently accompanied by mucocutaneous lesions. Epidermoid cysts and lipoma in FAP ; mucocutaneous pigmentations in PJS ; facial papules, gingival papillomas, and acral keratosis in CS ; alopecia, onychodystrophy, and cutaneous hyperpigmentation in CCS ; and mucocutaneous telangiectasia in JPs-HHT overlap syndrome are the major mucocutaneous lesions. Being familiar with the mucocutaneous lesions appears to be important for diagnosing GI polyposis syndromes.
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