尾骨偏位を伴わなかったcoccygeal pad

・17歳男性，尾骨部に腫瘤を自覚し当科を受診した．病理組織像で角質増殖と膠原線維の増生がありcoccygeal padと診断した． ・本症の発症機序はいまだ不明であり，先天的，後天的いずれの原因でも生じる可能性がある． ・仙骨，尾骨部の腫瘤を診察した際は，本症も考慮し，生活歴や遺伝的背景などの詳細な問診が大切であると考えた． （「症例のポイント」より）

Coccygeal pad

Inoue, Tsuyoshi1）Watabe, Daisuke1）Amano, Hiroo1） 1）Department of Dermatology, Iwate Medical University School of Medicine

Abstract A 17-year-old man visited our department with a mass observed in the coccygeal region. Histopathological examination revealed hyperkeratosis and proliferation of collagen fibers, leading to the diagnosis of a coccygeal pad.The pathogenesis of this disease remains unknown. It can be caused by either congenital or acquired factors. When a mass is observed in the sacrococcygeal region, it appears important to consider this disease and perform detailed history taking, including life history and genetic background.