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A Study of Nucleolar Organizer Regions in Cervical Intraepithelial Neoplasia and Human Papillomavirus Infection

A silver colloid technique for nucleolar organizer region–associated proteins (AgNORs) was applied to sections of cervix that comprised cervical intraepithelial neoplasia (CIN) grades I to III, koilocytosis indicative of human papillomavirus infection, squamous metaplasia, and basal cell hyperplasia. The AgNOR count was compared both within and between specimens. Proliferative activity was investigated by flow cytometric analysis. Significant differences in AgNOR numbers were found between normal internal controls and the lesions investigated. A correlation was found between the proliferative index (%S + G2) determined by flow cytometry and the number of AgNORs in cases of CIN.