打撲を契機に発症した大型のacquired periungual fibrokeratoma

・打撲が誘因となり左第Ⅲ趾に発症したacquired periungual fibrokeratoma（APF）の1例を報告した．

・側爪部に発生したこと，腫瘍内のムチン沈着が多かったことが大型の腫瘤を形成した要因と考えられた．

（「症例のポイント」より）

　

A case of large acquired periungual fibrokeratoma with onset of bruising

　

Takehara, Kouhei1）Nomura, Yoshihiro1） 1）Department of Dermatology, Toyama City Hospital

　

The patient was a 39-year-old woman. Six months ago, a part of the nail of the left third toe was damaged. One week later, a mass appeared at the same site and gradually increased. Physical examination showed A 15×13 mm, smooth, pink, broad base-raised mass in the lateral nail shell of the left third ridge. It was elastic hard, but without tenderness. Histologically, horny layer thickening, disappearance of epidermal processes, collagenous fibers and fibroblasts that grow like scaly at the base of the mass, and mucin deposits were observed in some of the dermis with edema.