Digital-papillary adenocarcinomaとの鑑別が困難であったsolid-cystic hidradenomaの1例

Solid-Cystic Hidradenoma of the Left Thumb with a Difficult Differential Diagnosis from Digital-Papillary Adenocarcinoma

はじめに

　結節性汗腺腫（以下，solid-cystic hidradenoma）は，皮膚付属器腫瘍の中でも汗管由来の良性腫瘍である 1）。通常は成人期に小さな結節として現れ，頭頸部や躯幹部を好発部位とする 2）3）。手指に現れることは比較的珍しく 4），また同部に発生したものは病理組織学的診断上，指趾乳頭状腺癌（以下，digital-papillary adenocarcinoma）との鑑別が難しいとされる 5）。今回，病理組織学的診断上digital-papillary adenocarcinomaとの鑑別が困難であったsolid-cystic hidradenomaの症例を経験したので報告する。

　Solid-cystic hidradenoma is a benign appendage tumor of the skin classified as a sweat gland tumor. It usually appears in adulthood as a small nodule, with a predilection for the head and trunk. Its appearance on the fingers is relatively rare, and it is difficult to histopathologically distinguish from digital-papillary adenocarcinoma. We treated a 44-year-old man with a left-thumb nodule; after the noduleʼs excision, it was difficult to histopathologically determine whether the tumor was a solid-cystic hidradenoma or a digital-papillary adenocarcinoma. We describe the patientʼs course and our findings.