Breast Carcinoma with Osteoclast-like Giant Cells

Differential Diagnosis

Metaplastic Carcinoma of the Breast with Mesenchymal Differentiation	Carcinoma of the Breast with Osteoclast-like Giant Cells
Sarcomatous (malignant) stroma	Only giant cells, no neoplastic stroma
May form osteoid (osteosarcoma)	No osteoid

Other metaplastic carcinomas with non-mesenchymal differentation would not be confused with carcinomas with osteoclast-like giant cells