Objective: To assess the prognostic significance of atypical squamous cells of undetermined significance (ASCUS) using an in situ hybridization (ISH) method for destined cervical cytologic smears and a cocktail of biotinylated DNA probes for human papillomavirus (HPV) 6, 11, 16, 18, 31 and 33.

Study Design: Two HPV DNA probe mixtures were applied to the same smear for the simultaneous detection of high-risk HPV types 16, 18, 31 and 33 and low-risk HPV 6 and 11. ISH was carried out on 192 smears. Among them, 59 showed koilocytosis, 91 ASCUS and 42 normal features.

Results: Low-risk HPV types were rarely found and associated mainly with koilocytosis (17%). High rates of potentially oncogenic HPV were detected in ASCUS (41%) and condyloma (73%). In addition, similar levels of positivity were found to be associated with ASCUS when using two probe mixtures specific to high-risk HPV: one included HPV genotypes 16 and 18 and the other, genotypes 31 and 33.

Conclusion: HPV DNA typing by ISH on cervical cytologic smears might improve the identification of women at high risk of developing precancerous and cancerous cervical lesions.

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http://dx.doi.org/10.1159/000331819DOI Listing

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