Primary Osteosarcoma of the Breast in a Patient Treated Previously for Invasive Ductal Carcinoma: An Unusual Presentation of a Very Rare Primary Breast Malignancy

<div>(a) Malignant tumour with surrounding breast parenchyma (H&amp;E, ×4). (b) Malignant tumour composed of neoplastic woven bone intimately admixed with pleomorphic tumour cells (H&amp;E, ×10). (c) Neoplastic woven bone exhibiting eosinophilic osteoid along with high pleomorphic tumour cells (H&amp;E, ×10). (d) Pleomorphic tumour cells having vesicular chromatin and conspicuous nucleoli showing both osteoblastic and osteoclastic (giant cell) subtypes (H&amp;E, ×40).</div>

Case Reports in Surgery

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Figure 2: Primary Osteosarcoma of the Breast in a Patient Treated Previously for Invasive Ductal Carcinoma: An Unusual Presentation of a Very Rare Primary Breast Malignancy 

Figure 2 | Primary Osteosarcoma of the Breast in a Patient Treated Previously for Invasive Ductal Carcinoma: An Unusual Presentation of a Very Rare Primary Breast Malignancy 