Authors
1
Dept. of Histopathology, Iraqi Board for Medical Specialties, Babil Center, Iraq.
2
Dept. of Pathology, Babil College of Medicine, University of Babylon -Iraq .
3
Dept. of gynecology, Babil College of Medicine, University of Babylon –Iraq.
,
Document Type : Research Paper
Abstract
BACKGROUND:
Ovarian serous neoplasms are the most common type of epithelial ovarian tumors, classified as Low-Grade Serous Neoplasia (inclusive of benign serous cyst adenoma, borderline serous tumors, low grade serous carcinoma) and High-Grade Serous Carcinoma. P16 is a cyclin-dependent kinase-IV inhibitor that mediates its action through inhibitory effect on the cell cycle, Ki-67 determine the proliferating cells of the tumor, is strictly connected with cellular cycle.
OBJECTIVE:
The aim of the present study is to diagnostic evaluate of p16 and ki67 protein expression in of ovarian serous tumors in Iraqi patients.
MATERIAL AND METHODS:
52 cases of ovarian serous tumors specimens were studied. Using p16 (Mouse monoclonal p16 antibody, Cytoplasm and Nuclear expression) and ki67 (monoclonal mouse antihuman Ki-67/MIB-1 antibody, Nuclear expression).
RESULTS:
There is a significant correlation of p16 and ki67 expression in ovarian serous tumors. P16 Immune reactive score cases with score 3 of high grade serous carcinoma 69.2%, low grade serous carcinoma 7.7%, borderline serous 15.4%, and no any case of ovarian serous cyst adenoma. Ki67 labeling index expression in all cases of ovarian serous cyst adenoma, 76.92% borderline tumors, 92.96% low grade serous tumors with low labeling index. While 100% high grade serous carcinoma, 23.07% borderline tumors, 7.7% low grade serous carcinoma with high ki67 labeling index.
CONCLUSION:
Significant correlation of p16 expression in ovarian serous tumors, with strong diffuse expression in high grade serous carcinoma. P16 can be used as a diagnostic marker. Ki67 has been reported to be of a diagnostic value in differentiation of low grade serous carcinoma from high grade serous carcinoma.
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