Abstract
BACKGROUND: HPV 18 is one of the important oncogenic types. HPV 18 is generally evaluated together with HPV 16 and/or high-risk HPV types in light microscopic studies. The purpose of this study was to evaluate the impact of only HPV 18 on the nucleus/cytoplasm ratio, and chromosomal and nuclear degenerative changes in liquid-based samples. MATERIALS AND METHODS: Eighty liquid-based cervical samples were used in this retrospective study. These smears were prepared by HPV Deoxyribonucleic Acid (DNA) detection and genotyping with the Cobas 4800 HPV system. Forty HPV 18 infected and forty smears with no infection agent were evaluated for chromosomal (nuclear budding, micronuclei), nuclear degenerative changes (membrane irregularity, nuclear enlargement, hyperchromasia, abnormal chromatin distribution, binucleation (BN), karyorrhexis (KR), karyolysis (KL), karyopyknosis (KP)), and cytologic findings (koilocyte (KC), cells with perinuclear PR) using light microscopy. Cellular diameters were evaluated using image analysis software. Statistical analysis was performed with Statistical Package for Social Sciences (SPSS) 19.0. p values < .05 were considered significant. RESULTS: The statistically significant difference between the presence of HPV 18 and karyorrectic cell, KC, nuclear membrane irregularity, enlargement, the mean nuclear width and height (p < 0.05). No cellular changes other than those mentioned were observed. CONCLUSIONS: The present study is significant in that, it reveals the relationship between only and particularly HPV 18 and nucleus/cytoplasm ratio, and chromosomal and nuclear degenerative changes in liquid-based cytology. HPV 18 affects KR, koilocytosis, nuclear membrane irregularity, enlargement, and nuclear diameters. Light microscopic analysis of these abnormalities increases the sensitivity and specificity of cytology in the evaluation of cellular pictures due to HPV 18.