Phyllodes tumors of the breast are rare and most often occur in young women. Bilateral occurrence is very rare. A 31-year-old female patient was operated on 7 years ago due to a mass in her right breast and was histologically diagnosed as benign phyllodes tumor. In her follow-up, synchronous masses were detected in her right and left breast. The masses in both breasts were excised with intact surgical margins. The histopathological examination revealed “Phyllodes tumor”. The first and second tumors in the right breast were accepted as metachronous, while the tumor on the left breast and the second tumor on the right breast were considered to be synchronous tumors. We present our case to draw attention to the significance of the disease, its possible bilateral occurrence, and surgery.
Keywords: breast, phyllodes tumor, bilateral, synchronous, metachronous