Diagnostic and Prognostic Significance of Ki-67 Immunohistochemical Expression in Surface Epithelial Ovarian CarcinomaCorrespondence Address :
Dr. Asha Mahadevappa,
#1036, 5th Main, 10th Cross, 1st Stage Vijayanagar, Mysuru-570017, Karnataka, India.
Introduction: The Surface Epithelial Ovarian Carcinoma (SEOC) at the moment of diagnosis, the disease is extended beyond the structures of the pelvis. Ki-67 is one of the prognostic marker which determines the growth fraction of a tumour and its over expression is associated with malignancy, tumour aggression, reserved prognosis and metastasis.
Aim: To evaluate the proliferative activity using Ki-67 immuno-staining in SEOC and to correlate with histological subtype, grade, Federation of Gynecology and Obstetrics (FIGO) stage, CA125 levels for diagnostic and prognostic purpose.
Materials and Methods: The study was conducted in JSS Medical College and Hospital, JSS University, Mysuru. It was a descriptive cross-sectional study involving 40 cases of SEOC over a period of two years. The proliferation expression related to Ki-67 antigen was evaluated by immunohistochemical monoclonal MIB-1 antibody. In each case, the Ki-67 labeling index (Ki-67 LI) was articulated as percentage of positively stained cells using high power objective of the microscope (x400).
Results: Among the 40 carcinomas, 26 were serous, five mucinous, four each of clear cell and undifferentiated and one transitional cell carcinoma. A total of 75% were high grade tumours. High Ki-67 LI was associated with high grade tumours (69.9%), high grade serous tumours (65.34%) and advanced FIGO staging (70.6%) with the p-value of <0.001. CA 125 levels did not have a significant correlation with Ki-67 LI.
Conclusion: Ki-67 is an exceptionally a cost effective marker to determine the growth fraction of a tumour cell population. In SEOC histological grade and FIGO stage when combined with Ki-67 LI in histopathology report would help in diagnostic differentiation of subtypes, prognostication, deciding the need for adjuvant chemotherapy and in predicting survival analysis.
Ovary, Proliferative index, Serous carcinoma, Survival
Asha Mahadevappa, Shruthi Mysore Krishna, Manjunath Gubbanna Vimala. DIAGNOSTIC AND PROGNOSTIC SIGNIFICANCE OF KI-67 IMMUNOHISTOCHEMICAL EXPRESSION IN SURFACE EPITHELIAL OVARIAN CARCINOMA. Journal of Clinical and Diagnostic Research [serial online] 2017 February [cited: 2017 Feb 19 ]; 11:EC08-EC12. Available from
Date of Submission: Sep 23, 2016
Date of Peer Review: Sep 30, 2016
Date of Acceptance: Oct 07, 2016
Date of Publishing: Feb 01, 2017
Financial OR OTHER COMPETING INTERESTS: None.
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