A 49-year-old woman visited our hospital after noticing an enlarged left breast mass. After a biopsy, she was diagnosed with fibroadenoma and underwent tumor resection. Postoperative pathology revealed squamous cell carcinoma (SCC) within a benign phyllodes tumor. Following additional resection, adjuvant chemotherapy was administered in accordance with the treatment for triple-negative breast cancer, and the patient has since progressed without recurrence for four years. The occurrence of SCC within a phyllodes tumor is extremely rare, and we report this case through a review of the literature.
Keywords: benign breast tumor; breast cancer pathology; breast surgery; phyllodes tumour; squamous cell carcinoma (scc).
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