Sclerosing Microcystic Adenocarcinoma of the Base of Tongue with Signet Ring-Like Cell Component: A Rare Case.

Sclerosing microcystic adenocarcinoma (SMA) is an uncommon neoplasm of the oral cavity, with only 14 reported cases documented in the literature. We present a case of SMA in a 65-year-old woman with a history of high-grade lymphoma who developed clear cell changes in the deep muscular layer of the tongue. Currently, the diagnosis of SMA relies on careful morphological evaluation and the exclusion of other potential differential diagnoses.