罕見原發於陰囊之小汗腺瘤-病例報告

張乃文¹、王紹全^1,2,3

¹中山醫學大學附設醫院 泌尿科， ²醫學院， ³醫學研究所

Eccrine poroma on the scrotum, an extremely uncommon primary location - A case report

Nai-Wen Chang¹, Shao-Chuan Wang^1,2,3

Department of Urology¹, School of Medicine² and Institute of Medicine³, Chung Shan Medical University Hospital, Taichung, Taiwan

Introduction: We presented a case of eccrine poroma on the scrotum. Eccrine poroma originates from cells of the outer layer of the acrosyringium and terminal eccrine duct. It is commonly found on palms and sole or sides of the foot, occasionally on hairless surfaces of the extremities, chest, back, head, and neck. The scrotum is an extremely uncommon primary location.

Case presentation: A 68-year-old man had a tumor on the left side of the scrotum for a year. The tumor grew asymptomatically and there was no obvious pain or any other symptoms. Physical examination revealed a soft, pedunculated, and well-circumscribed tumor about 3 cm in length (Figure A). The pathology specimen under microscopic examination showed well-demarcated intraepidermal proliferation of poroid cells demonstrating monomorphous and cuboidal cytomorphology with oval nuclei and intercellular bridges (Figure B).

Discussion: Eccrine poroma is benign nature and it affect adults between fourth and sixth decades. Though rarely, it has the potential of malignant transformation which occurs at 18~50% of eccrine porocarcinoma. Eccrine porocarcinoma are seen more often in the elderly, with a female predominance.