Article Details

Malignant phyllodes tumor (MPT) is a rare lesion in the female breast, representing less than 1% of all breast tumors. There have been case reports of coexistent breast carcinoma (both ductal and lobular carcinomas) with MPT. This coexistence has been shown to be associated with the malignant category of phyllodes tumors. Rarely, is breast carcinoma diagnosed preoperatively in the setting of MPT. We report a case of regionally metastatic MPT with heterologous components of osteosarcoma and chondrosarcoma with an incidental finding of an internal mammary lymph node positive for invasive ductal carcinoma while the axillary lymph nodes are positive for the sarcoma. This case is presented along with a literature review. The multidisciplinary breast care team must be aware of the coexistence of carcinoma and MPTs and consider a thoughtful treatment plan for extirpation and reconstruction with potential need for radiation and systemic therapy.

Keywords: Breast cancer; Phyllodes tumor; Breast cancer staging