Eccrine Poroma: An Unusual Variant / 대한피부과학회지

ABSTRACT

Eccrine poroma, first described in 1956 by Pinkus, is a fairy common benign skin appendage tumor arising from the poral epitheliurr of the eccrine sweat gland in most regions of the body surface, hairy or nonhairy. generally in persons past the age of 40. The tumor is almost always single, but cases of eccrine poromatosis have been described and is a firm, sometimes lobulated nodule which may be sessile or slight pedunculated. There is often a vascular appearance, and the clinical appearance may suggest pyogenic granuloma. Microscopically, the tumor mass extends from the epidermis downward into the dermis as broad, anastomosing bands. Tumor cells are small, uniform, cuboidal appearance containing round, deeply basophilic nucleus and are connected by intercellular bridges. PAS stain-positive glycogen which diisappears with diastase are irregularly scattered in the tumor cells. A caee of unusual variant of eccrine poroma is reported. 25-year-old male patient has a finger tip sized crusting pedunculated lesion for approximated 12 months on the right postauricular area. The diagnosis was confirmed by clinical and histopathological findings as eccrine poroma and surgical excision was done.