["Carcinoma in situ" of the mammary gland (author's transl)].

The paper summarizes the available knowledge on the so-called "cancer in situ" of the mammary gland. In 1960 to 1975 61 patients were operated on at the Institute. The diagnosis "carcinoma in situ"--was not established before a microscopic study of the removed specimen was conducted. Following sectoral resections of the mammary gland für "carcinoma in situ" two patients developed cancer in other quadrants of the gland: one--after 45 years, the other after 15 years. The authors believe the term "carcinoma in situ" to be improper for clinical practice due to its inherent contradiction, which not infrequently results in diagnostic, therapeutic and organisational errors.