A Case of Eccrine Acrospiroma in Scrotum

Ha, Dal Bong

Abstract

Acrospiroma is a rare benign tumor and a clinicopathologically distinctive neoplasm differentiating toward the distal part of the eccrine sweat gland. I experienced a case of dermal acrospiroma in a 59-year-old man who had a 7.0x6.5 x 5.3 cm sized, slowly growing, brown colored, smooth-surfaced mass on the right scrotum for 3 years. Histological examination revealed lobular structures composed of small fusiform cells and large eosinophilic polyhedral cells. Histochemically some of large polyhedral cells had PAS-positive DPAS-negative glycogen and Alcian-positive mucin in cytoplasm. Immunohistochemical stainings for vimentin, S-100, low molecule keratin, and EMA were positive in the tumor cells. During 6 months follow up period after excision, there was no recurrence. However, it is necessary to follow up for a long period because some acrospiroma may recur after a long silence period.