Breast Cancer / Humans / Breast Cancer Early Detecion and Treatment / Female / Protein Tyrosine Kinase / Breast / Protein tyrosine phosphatase / Enzyme / Prognosis / Lymph Node / Protein Tyrosine Phosphatases / Mitotic Index / Case Control Studies / Breast / Protein tyrosine phosphatase / Enzyme / Prognosis / Lymph Node / Protein Tyrosine Phosphatases / Mitotic Index / Case Control Studies