82 year old female with history of left breast invasive ductal carcinoma, status post lumpectomy and radiation treatment who presented with bruising around her nipple five years after radiation treatment. Initial mammogram (not shown) was reported as normal. Skin punch biopsy revealed postradiation angiosarcoma. Pre-surgical MRI revealed diffuse, non-mass like T2 hypointensity within skin (A, arrow), which appeared T1 isointense (B), and rapidly enhanced on post-contrast imaging (C). Subsequent mastectomy was performed and the patient has been disease free for 25 months after treatment.