Adenosquamous carcinoma of oral cavity.

Adenosquamous carcinoma is a rare malignant epithelial neoplasm characterized by the presence of both areas of squamous cell carcinoma and adenocarcinoma. Only few cases of oral adenosquamous carcinoma have been previously reported in the literature. It has been described as a squamous cell carcinoma subtype with a high infiltrative capacity. This paper reports a rare case of adenosquamous carcinoma that involved the upper left buccal mucosa in a 55-year-old man.