Sclerosing Microcystic Adenocarcinoma: Report of a Rare Case and Review of Literature.

Sclerosing microcystic adenocarcinoma is an exceedingly rare entity occurring in the mucosal surfaces of the head and neck that closely resembles cutaneous microcystic adnexal carcinoma. Here, we report a case of sclerosing microcystic adenocarcinoma that presented as a vague mass at the floor of the mouth in a 55-year-old woman. The pathology features and the diagnostic challenges, especially in the biopsy and margin evaluation are discussed here. Similar cases published in the English literatures are reviewed.