MALIGNANT CLEAR-CELL HIDRADENOMA OF THE UPPER LIP

Malignant clear cell hidradenoma is an uncommon tumor of eccrine sweat gland origin that has a predilection for the head and neck. It is cha racterized by an indolent growth pattern yet frequently recurs followi ng surgical excision and has a high incidence of regional and distant metastases. A case of recurrent malignant clear cell hidradenoma of th e upper lip is presented. The lesion was treated with surgical excisio n followed by radiotherapy. The literature on this rare lesion is revi ewed and treatment strategies discussed. (C) 1994 John Wiley & Sons, I nc.