[Ductal cancer in situ in 1990. Review of the literature and comments on a case].

With the current development of mammographic screening of women over 50 years of age, there is a 7 percent increase in the number of cases of in situ canalar cancer; in some studies, this increase is a high as 15 or 20 percent. This cancer raises two types of problem. First, histologically, a large number of varieties have been identified and it is difficult for histologists to study the basal form in its integrity. Second, on the therapeutic level, there is disagreement as to the choice of limited surgery and mastectomy with or without radiotherapy. Unfortunately, one characteristic of in situ cancer is that it tends to recur in an invasive form or in situ.