Recurrent malignant phyllodes tumor of breast with gastric metastasis

Malignant phyllodes tumor of the breast (MPTB) is a rare breast malignancy. Surgery is the primary treatment for this malignant tumor. Adjuvant radiotherapy should be considered if the surgical margin is positive. The lungs and bone are the most frequent metastatic sites of MPTB; however, gastric involvement is rare. Herein, we report a 64-year-old woman with MPTB. Surgery was the initial treatment; however, lung and gastric metastases were found 5 years later. Palliative chemotherapy with the CyVADIC regimen (cyclophosphamide, vincristine, doxorubicin, and dacarbazine) achieved a partial response. In conclusion, systemic chemotherapy can be one of the treatment options for patients with metastatic MPTB.