Benign phyllodes tumor arising from accessory breast tissue of the axilla: An inquisitive rarity

Abstract

Accessory breast tissue is the superfluous tissue that persists from normal embryological development. The pathological involvement of this tissue is quite uncommon and can be diagnostically challenging. Phyllodes tumor is a rare mammary fibroepithelial lesion that has been seldom reported to originate from the accessory breast tissue. This article describes an extremely rare case of a benign phyllodes tumor arising from the accessory breast tissue of the left axilla in a 40-year-old female so as to create awareness about rare tumors occurring within rare anomalies.