Carcinoma Breast-Like Giant Complex Fibroadenoma: A Clinical Masquerade.

Fibroadenoma (FA) is a benign, painless, solid breast tumor that commonly occurs in young adult females. The term complex FA is used when it is associated with any of the following: cyst >3 mm, epithelial calcifications, sclerosing adenosis, or papillary apocrine metaplasia. FAs of size more than 5 cm or weighing more than 500 g are considered as giant FAs. Giant FAs are rare, and because of hormonal sensitivity, they commonly occur in pregnant or lactating women. We report the case of a 26-year-old female with a large breast mass that was clinically as well as grossly masquerading as breast carcinoma and turned out to be a giant complex FA on microscopy.