Eccrine porocarcinoma: a case report.

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.