title: Basaloid type adenoid cystic carcinoma of the breast.
abstract: We report a case of adenoid cystic carcinoma (ACC) of the breast with a prominent basaloid feature. The patient was a 62-year-old Japanese woman with a right breast mass, measuring 1.5 cm in diameter. Histologically, the tumor was composed of basal cell-like tumor cells, and it was originally diagnosed as invasive ductal carcinoma. The presence of PAS-positive basement membrane material around the tumor cell nests may be a diagnostic clue to ACC. The prognosis of ACC of the breast is considered to be favorable. However, basaloid type ACC may represent a poor prognosis, since our case revealed an aggressive behavior in spite of its small size.
authors.affiliation: Department of Pathology, Kawasaki Medical School, Kurashiki, Okayama, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Fukuoka
authors.forename: M
authors.initials: M
authors.lastname: Hirokawa
authors.forename: M
authors.initials: M
authors.lastname: Shimizu
authors.forename: Y
authors.initials: Y
authors.lastname: Sadahira
authors.forename: T
authors.initials: T
authors.lastname: Manabe
authors.forename: J
authors.initials: J
authors.lastname: Kurebayashi
authors.forename: H
authors.initials: H
authors.lastname: Sonoo
mesh_terms: D001943:Breast Neoplasms / Q000473:pathology*; D003528:Carcinoma, Adenoid Cystic / Q000473:pathology*; D005260:Female; D006801:Humans; D008875:Middle Aged