2000 年 50 巻 2 号 p. 171-173
Ductal carcinoma in situ (DCIS) of the breast has become a relatively common disease in women, while it remains a rare disease in men. We described a case of DCIS in a 67-year-old man. The patient had have a painless, defined, elastically firm and even tumor without skin retraction at his left retroareolar region. After excisional biopsy, he underwent mastectomy with dissection of axillary lymph nodes. All lymph nodes sampled were negative. The patient is free of disease without adjuvant-therapy at present.