Phenotypical and morphological heterogenity of breast cancer: Our experience J. Nieslanik * , J. Dvorácková, M. Uvírová, Š. Laciok, R. Ondruššek, D. Žiak * CGB Laboratory A.S., Dept. of Pathology, Ostrava, Czech Republic Objective: Breast cancer is the most frequent malignant tumor in women with a rising incidence. About 4 500 new cases are diagnosed in Czeck republic every year, up to 43 % die on it´s account.