Ductal carcinoma in situ in a 25-year-old man presenting with apparent unilateral gynecomastia.

摘要: Ductal carcinoma in situ (dcis) a young man is rarely reported. Our patient, 25-year-old man, presented with apparent symptomatic unilateral gynecomastia. He has strong history of cancer on both the maternal and paternal sides his family, including breast lung (maternal) melanoma, colon, pancreatic (paternal). His mother tested negative for BRCA1 BRCA2. There no information genetic testing. The patient was treated left subcutaneous mastectomy. Upon histologic review sample, concurrent gynecomastia dcis were discovered. To date, only 4 cases have been described younger male patients. Because 30%–50% patients eventually develop invasive subsequent 10–20 years, prevalence general population may be higher than predicted. This case underscores importance family any presenting mass. Patients must made aware risk, however small it be, physicians remain cautious men