Primary Mucinous Carcinoma of the Skin: Report of a Rare Case and Review of the Literature

Primary mucinous carcinoma (PMC) of the skin is a rare neoplasm derived from the sweat glands. It usually occurs in the head and neck region, in which the eyelids are the most common sites of involvement. Herein, we report a primary mucinous carcinoma of the skin in a 66-year-old female. Mass excisional biopsy confirmed "mucinous carcinoma" of the skin as the diagnosis. A full oncological screening excluded the presence of primary mucinous carcinoma elsewhere and any metastatic spread. The final diagnosis was "primary cutaneous mucinous carcinoma". The patient underwent radiation therapy after surgery. This case emphasizes the importance of considering this tumor in scalp lesions and highlights the pathology of this tumor.