A Case of Eccrine Poroma with A Large Cystic Space / 대한피부과학회지

ABSTRACT

Eccrine poroma is a benign skin appendage tumor originating from the intradermal part of the sweat duct. It is found commonly on the hairless surface of the feet, although eccrine poroma of the hands, head, trunk, and legs have been reported. Histopathologically, the tumor extends from the lower portion of the epidermis into the dermis as broad, anastomosing bands. The tumor cells are smaller than squamous cells, having a uniform cuboidal appearance and a round, deeply basophilic nucleus, connected by intercellular bridges. In eccrine poromas, narrow ducta1 lumina and occasional cystic spaces are found within the tumor bands, but a large cystic space is very unusual. We report a case of eccrine poroma with a large cystic space extending from epidermis into the reticular dermis.