Abstract

Metaplastic carcinoma is a rare form of breast cancer occurring in less than 1%. It constitutes a distinct aggressive form of invasive breast cancer with histological evidence of epithelial to mesenchymal transition towards spindle, chondroid or osseous cell type. Osseous metaplasia is an extremely rare variant of metaplastic breast carcinoma. We, therefore, present this case of a 45yr old woman with metaplastic breast carcinoma with osteosarcomatous differentiation and lung metastasis due to this rare combination. This patient had a massive recurrent tumour within two weeks of mastectomy. Keywords: Metaplastic, Breast, Cancer, osteosarcomatous

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