Eccrine porocarcinoma (malignant Eccrine poroma) with bone invasion and lymph node metastasis

ABSTRACT

Objective: Eccrine porocarcinoma is a rare malignant sweat gland tumor. This skin neoplasm represents only 0.005% of epithelial cutaneous neoplasms. We have diagnosed and treated a case of eccrine porocarcinoma in a cancer center institution, which is a regional reference for skin cancer treatment in Curitiba, Brazil. We report the clinicopathological data of this case. Material and Methods: We reviewed the medical records and notes, including surgical specimens of the skin tumor excised from a patient treated at our institution. All microscopic slides in our files from this case were reviewed. Results: A 58-year-old woman with no previous disease presented with a 9-month history of a progressively enlarging lesion on the occipital region. It was partially fixed to periosteum and associated with retracted adjacent tissues. A soft tissue biopsy revealed an eccrine porocarcinoma of the scalp. Conclusions: Because of the aggressive progression of this neoplasm, the best treatment option includes associated surgical excision and no adjuvant therapy.