The exact local prevalence of angiosarcoma of the breast is unknown. The challenge in pinning down the incidence is due it its rarity and possible difficulty in diagnosis since it may mimic other benign breast disorders. We are reporting a case of a 21-year-old female Filipino patient who presented with a 2cm x 2cm palpable mass on the upper outer quadrant of her right breast initially diagnosed through cytology as hemangioma and was later found out to have angiosarcoma of the breast after mastectomy. This is to illustrate the clinical presentation, methods of diagnosis, surgical management, and consequently better understanding of this clinical entity.

Human ; Female ; Adult ; Angiosarcoma Of The Breast ; Hemangiosarcoma ; Mastectomy ; Breast ; Hemangioma