[Mitotic regimen of histologic variants infiltrating duct carcinoma of the breast].

Mitotic regimen was studied in 197 cases of infiltrating duct mammary carcinoma found at mammography screening and subdivided according to the prognostic F. Linell classification (1980) into two groups (1-tubular, duct-tubular and II-comedo-type carcinoma). Indices of the mitotic regimen and particularly mitotic index showed statistical differences in these groups. Comedo-type carcinoma with a poorest prognosis is characterized by a high mitotic index (near 20% and higher) and pronounced mitosis pathology correlated with a degree of cell polymorphism. Mitotic index of a tubular and duct-tubular carcinoma is much lower (as a rule lower than 10%) this reflecting their more favourable prognosis.