Fine-needle aspiration of low-grade adenosquamous carcinomas of the breast: a report of three new cases.

Objectives: To describe cytology patterns in low-grade adenosquamous carcinomas (LGASCs) of the breast.

Study Design: Low-grade adenosquamous carcinomas of the breast are a recently described rare variant of primary metaplastic carcinomas characterized by clinical indolence, slow evolution and excellent survival. To date, only 7 cases of LGASC were studied cytologically, and it was demonstrated that LGASC identification was difficult because its cellular components exhibited unspecific and nonsuspicious features.