Abstract
Malignant phyllodes tumor is an unusual breast neoplasm. A 22-year-old woman was admitted to the hospital because of a small lump (3×3cm) in the area AC of the left breast. As the lump was extirpated and found to be malignant phyllodes tumor, a wide resection was performed. The most important therapy for malignant phyllodes tumors of the breast is surgical resection, and mastectomy with lymph node dissection has been principally employed in former times. The tumor, however, hematogenously metastasizes and recurs locally with unsatisfactory resection, and lymph node metastasis rarely occurs. Recently breast conservative surgical method tends to be indicated. In this case, the tumor was relatively small as the phyllodes tumor and the patient was unmarried young woman, and we chose a conservative surgical method. After the operation, a total cross section confirmed that surgical margin was free. Because no effective chemotherapy for malignant phyllodes tumor has been established as yet, adjuvant chemotherapy was not employed. The patient is now doing well with no evidence of recurrence, as of 20 months after the surgery. However, careful follow-up study of local recurrence and distant metastasis would be mandatory.
