Eccrine Porocarcinoma: A Case Report

Abstract

Eccrine porocarcinoma is a rare malignant sweat gland tumour. Clinical presentation can vary from an indurated plaque to a polypoid ulcerated and bleeding lesion. Diagnosis of eccrine porocarcinoma on clinical observation only is quite impossible. Here we present the case of a 64-year-old female patient with a small reddish nodule of the knee that, on histological evaluation, proved to be an eccrine porocarcinoma.

Porocarcinoma presenting as soft tissue swelling on the back: A case report

“…Sections taken from margins of wide excision showed features of eccrine poroma. [1,3,5,7,8]. It is predominantly seen in elderly patients [2,6] as in our case.…”

“…Theses tumor cells present in epidermis and dermis can cause cutaneous metastasis and pagetoid pattern of spread. PC may show epidermotropic spread [1,2]. Lymphovascular invasion, perineural invasion, comedo type of necrosis can also be seen.…”

“…About 50% of tumors occur on buttocks and feet. Upper arm, head, chin, chest, forehead, nose, valve, trunk breast, nail bed are the rare sites of presentation [1][2][3]8]. PC presenting as soft tissue swelling on the back is very rare.…”

“…It is prone to local recurrence and occasionally associated with lymph node metastasis. Systemic spread is rare [1,11].…”

“…PC accounts to 0.005% of epithelial cutaneous neoplasms [1]. PC can arise denovo or in a longstanding poroma (50%), hidroacanthoma simplex or naevus sebaceous as a malignant transformation [2,3].…”