Hidradenocarcinoma originado en hidradenoma nodular: descripción de un caso

Malignant nodular hidradenoma or hidradenocarcinoma is a rare, malignant tumour of sweat glands that usually arises de novo, although a few cases originating in a nodular hidradenoma have been reported. They are very aggressive neoplasms that recur locally and frequently metastasize to the lymph nodes. The treatment of choice is surgical excision with wide margins, followed by chemotherapy and/or radiotherapy when metastases have occurred. Recently, sentinel lymph node sampling and treatment with Trastuzumab have been proposed for cases with overexpression of Her-2/neu. A case of hidradenocarcinoma arising in a nodular hidradenoma of the breast skin of a 55 year old woman is presented. The tumour was surgically removed with a wide excision and the patient treated with postoperative radiotherapy. She is alive and well without evidence of metastatic disease one year later.