[Male breast cancer].

Only 1% of all breast cancers develop in men, and it accounts for no more than 0.17% of cancer in the male population. In contrast to women with breast cancer, men with breast cancer are older and have more advanced disease.

[Ductal carcinoma in situ].

Ductal carcinoma in situ (DCIS) is now found far more frequently because of mammograms, appearing with microcalcifications. Actually, it is probably very common. Premalignant lesions such as ductal carcinoma in situ are demonstrating the truth of a major concept: that there are lesions within the breast that may be locally removed and controlled before the development of metastatic disease.