Malignant Eccrine Poroma of the Scalp-One Case Report

Abstract

Malignant eccrine poroma is a rare cutaneous neoplasm of sweat ductal origin. The term was first introduced by Pinkus and Mehregan in 1963 to describe epidermotropic eccrine poroma. About 100 cases have been reported in medical literature. It usually happens in the old age. It can be a single nodule, polypoid or ulcerative tumor. Distant visceral, regional lymphatic and cutaneous metastases have been reported in previous literature. A case of 79-year-old male with repeated recurrent scalp malignant eccrine poroma and neck skin metastasis is presented. Wide excision with free surgical margin was our strategy. The defects after tumor excision were reconstructed successfully in each operation. No adjuvant radiotherapy or chemotherapy was done due to unpredictable results. No visceral or lymph node metastasis were noted during this period. The patient died of multiple organ failure due to infection of central nervous system 3 years after disease occurrence. We discuss this case and review the past reports.