Hemangiomas are common benign soft-tissue tumors that rarely originate in both the pectoris muscle and breast. In the first place, this study presents a 24-year-old man with such a tumor causing diagnostic dilemma both clinically and radio-logically. In retrospect, we discovered some characteristic radiologic findings which could lead to a preoperative diagnosis. A variety of entities may simulate breast tumors in the male chest wall. We discuss differential diagnoses that simulate gynecomastia and characteristic imaging findings of hemangiomas.