A case of giant malignant phyllodes tumor of the breast

Abstract

A 46-year-old woman developed a large right breast tumor. A phyllodes tumor was diagnosed based on needle core biopsy results. A CT scan showed right axial lymph node swelling and invasion of the pectoralis major muscle. The tumor and the axial lymph nodes were removed. The resected specimen weighed 3,927 g, and on histology, a diagnosis of malignant phyllodes was made. This paper presents our case and reviews the 26 cases of giant malignant phyllodes tumor of breast reported in the Japanese literature to date.