21 Keshgegian Keshgegian AA AA Cnaan Cnaan A A Proliferation markers in breast carcinoma Mitotic figure count, S-phase fraction, proliferating cell nuclear antigen, Ki-67 and MIB-1 Proliferation markers in breast carcinoma Mitotic figure count, S-phase fraction, proliferating cell nuclear antigen, Ki-67 and MIB-1 Am J Clin Pathol. This evidence concerns the gene MKI67 and breast carcinoma.