Deceptive Triple-Negative Breast Cancer of Intermediate Grade: A Case of Rare Microglandular Adenosis-Associated Carcinoma.

Breast cancer is the most common cancer among women and the leading cause of cancer-related deaths globally. Ductal carcinoma of no special type is the most prevalent, followed by lobular carcinoma. Finding a triple-negative breast cancer of intermediate grade on core biopsies should raise the possibility of dealing with one of the rare subtypes such as microglandular adenosis (MGA)-associated carcinoma.