MKI67 and ovarian carcinoma: In our present study, we focused on understanding the distribution of various CSC-specific markers in normal ovary and various stages of ovarian tumorigenesis (BN, BL and HG), and characterization of CSCs in HG metastatic ovarian cancer tissues (Figs. 1A, B, 2A, B and 3A, B, Additional file 1: Figure S1 and Additional file 2: Figure S2) and their co-localization with cell proliferation marker [KI67] (Figs. 4, 5, 6, 7 and 8, Additional file 3: Figure S3, Tables 3 and 4).