title: Multifocal adenoid cystic carcinoma of the lip.
abstract: A 62-year-old Caucasian woman had several distinct and separate adenoid cystic carcinomas which involved both sides of the upper lip. Microscopic examination of the surgical specimens suggested that at least one of these malignant neoplasms arose from a pre-existing basal-cell adenoma.
mesh_terms: D003528:Carcinoma, Adenoid Cystic / Q000473:pathology*; D005260:Female; D006801:Humans; D008048:Lip Neoplasms / Q000473:pathology*; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*