2024 Volume 3 Issue 4 Pages 313-317
A female patient in her 40's noticed a lump in her right breast ten years before her current presentation. One year earlier, the lump began rapidly increasing in size and was accompanied by the development of skin ulcers. Computed tomography revealed a giant mass on the outer side of the right breast. Based on analysis of a biopsy specimen, borderline phyllodes tumor was diagnosed. The patient underwent a simple mastectomy of the right breast with a skin graft. The resected tumor was 6.1 kg in weight, had a maximum diameter of 39 cm, and was pathologically diagnosed as a borderline phyllodes tumor. At postoperative year 2, the patient has had neither a local recurrence nor distant metastasis.