Utility of proliferation-associated marker MIB-1 in evaluating lesions of the uterine cervix.
Various cervical lesions at times may be difficult to distinguish from one another on routine hematoxylin and eosin stains, and immunostaining for the proliferation-associated antigen Ki-67, using monoclonal antibody MIB-1, can aid their distinction. The reduced MIB-1 expression in atrophy and increased MIB-1 expression in dysplasia permits easy distinction between these conditions. Presence of MIB-1 in more than 15% of basal cells and/or in surface half of the epithelium favor a diagnosis of condyloma over squamous metaplasia or inflammatory changes. Normal endocervix shows MIB-1 positivity in less than 10% of the cells, but usually in more than 20% of cells in cervical adenocarcinoma. With increasing grade of dysplasia, the percentage of MIB-1 positive cells is increased, and positive cells are seen in the higher levels of the epithelium. Presence of more than 20% MIB-1 positive cells in Pap smears showing atypical cells of uncertain significance is associated with a diagnosis of dysplasia on subsequent biopsies. Cauterized tissues with dysplasia show MIB-1 expression similar to adjacent noncauterized dysplastic areas. MIB-1 expression is, therefore, useful in evaluating various cervical lesions.
Mittal
K
K
Department of Pathology, New York University School of Medicine, New York 10016, USA.
D000230:Adenocarcinoma / Q000378:metabolism / Q000473:pathology; D000911:Antibodies, Monoclonal; D034961:Antigens, Nuclear; D015415:Biomarkers; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D019394:Ki-67 Antigen / Q000378:metabolism*; D009687:Nuclear Proteins / Q000378:metabolism*; D002578:Uterine Cervical Dysplasia / Q000378:metabolism* / Q000473:pathology; D002583:Uterine Cervical Neoplasms / Q000378:metabolism* / Q000473:pathology
D000911:Antibodies, Monoclonal; D034961:Antigens, Nuclear; D015415:Biomarkers; D019394:Ki-67 Antigen; D009687:Nuclear Proteins