Giant Borderline Phyllodes Tumor With Malignant Presentation: A Case Report

Abstract

Phyllodes tumor (PT) is a rare benign tumor with malignant potential. There have been few case reports that have described this condition. We report the case of a 61-year-old woman with a "giant" borderline PT who underwent a modified radical left breast mastectomy with left axillary lymph node dissection, followed by chest wall reconstruction using serratus anterior and pectoralis major muscle flap coverage. A breast tissue measuring 22.5 × 18.5 × 12.5 cm and weighing a total of 5.2 lbs was resected. A case report like this can provide further information on surgical management of the tumor and the importance of an early diagnosis. In addition, PTs are rare to find in patients and this case will further contribute to the literature regarding PT.