Osseous Metaplasia of the Breast: A Series of Rare Cases

Osseous metaplasia is a reversible condition in which non-osseous soft tissue is replaced by bone. This is most commonly seen in musculoskeletal system and central nervous system. Osseous metaplasia in breast is a rare event. In this case series, we have reported 4 cases of osseous metaplasia of breast. 1 case of Osseous metaplasia in benign phyllodes tumor, 1 case of Osseous metaplasia in fibroadenoma, 1 case of Osseous metaplasia in invasive breast carcinoma and 1 extremely rare case of Osseous metaplasia of breast presenting as breast lump without any other associated pathology. Since osseous metaplasia of breast is a rare phenomenon, this entity specially in association with benign breast disease conditions pose a great challenge for accurate diagnosis.