A Case of Eccrine Porocarcinoma on Back.

Choi, Seok Min; Kim, Cheol Hann; Kang, Sang Gue; Tark, Min Seong; Park, Sang Mo; Jin, So Young

Case Report

Journal of the Korean Society of Plastic and Reconstructive Surgeons 2008;35(1):99-102.
Published online January 1, 2008.

A Case of Eccrine Porocarcinoma on Back.

Seok Min Choi, Cheol Hann Kim, Sang Gue Kang, Min Seong Tark, Sang Mo Park, So Young Jin

¹Department of Plastic and Reconstructive Surgery, College of Medicine, Soonchunhyang University, Seoul, Korea. kchann@sch.hosp.ac.kr
²Department of Pathology, College of Medicine, Soonchunhyang University, Seoul, Korea.

Abstract

PURPOSE
Eccrine porocarcinoma is a very rare, potentially fatal tumor which arises from the intraepidermal portion of the eccrine sweat ductal apparatus. It does not have a characteristic clinical feature but does have a high incidence of metastasis. It may be developed de novo or in a preexisting benign eccrine poroma. It usually affects older people and is located most commonly on lower extremities. We report a rare case of eccrine porocarcinoma which developed on the back without metastasis. METHODS: The patient was a 94-year-old woman who showed a painful, ulcerated, dark brown colored polypoid 3.5x3.0cm sized mass on the back for 3 years. We totally excised the lesion including normal tissue.
RESULTS
After wide excision of the lesion, pathologist reported an eccrine porocarcinoma. Histopathologic findings reveal that the classic type of eccrine gland carcinoma, eccrine porocarcinoma. Immunocytochemical studies showed a positive reactivity to anti-EMA antibody and anti-CEA antibody.
CONCLUSION
Authors experienced a rare case of primary eccrine porocarcinoma on the back. Because of the propensity to develop local recurrence, wide excision of the primary tumor with histologic confirmation of negative margins represents the only curative treatment regimen for eccrine porocarcinoma.

Keywords: Eccrine porocarcinoma; Back