Osseous metaplasia of the breast: diagnosis with stereotactic core biopsy.

There are approximately 200 reported cases of breast tumors containing areas of bone. The majority of the neoplasms are sarcomas, phylloides tumors, or fibroadenomata. We present a case of osseous metaplasia mammographically detected by clustered heterogeneous calcifications. Stereotactic core biopsy revealed the presence of well-formed bone tissue without associated neolplasia. The case represents the first reported case of mammographically detected osseous metaplasia confirmed by core biopsy.