934P - Human Papillomavirus Infection and Herpesvirus Infection in Vulvar Cancer Patients

Abstract

ABSTRACT Aim: The purpose of the study was to detect frequency of Human papillomavirus infection (HPV) and herpes viruses in vulvar cancer patients. Methods: Samples of formalin-fixed paraffin embedded tumor tissues of 148 patients aged from 14 to 85 years were studied. DNA of high-risk and low-risk HPV, herpes simplex virus 1 and 2 (HSV-1,2), cytomegalovirus, Epstein-Barr virus (EBV) and human herpesvirus 6 (HHV-6) were determined. DNA amplification with its posterior detection was performed using PCR. Results: DNA of low-risk HPV and HSV-1,2 were not detected. 70 of 148 patients (47,29%) had DNA of different viruses. The most frequent were DNAs of HPV of various types – in 44 (29,7%) patients, at that 32 patients had only one type while in 12 patients it was in association with DNA of other viruses; EBV was found in 24 (16,2%) patients, in 10 of them – in association with other viruses; HHV-6 was found in 12 (16,2%) patients, in 8 of them – in association; cytomegalovirus was found in 4 (2,7%) patients, in 2 of them – in association. Thus, the most frequent was HPV, EBV was lesser frequent and HHV-6 and cytomegalovirus were the least frequent. Of all genotypes of HPV alone, type 16 was in 54,5% of the cases, 56 type in 4 (9,09%) cases and 45 and 52 types in 2 cases. In all 12 cases of HPV in association it was type 16 combined with type 18 (4 cases) and types 39, 31 or EBV and HHV-6 (2 cases). Thus, high-risk HPV-16 was the dominant both alone (54,5%) and in association with other genotypes and viruses. 36 (81,1%) of 44 patients had HPV-16, from 2 to 4 patients had genotypes 45, 52 or 56 alone, and only 2 patients had HPV-18, 31 or 39 plus HPV-16. Besides, EBV, cytomegalovirus and HHV-6 were detected in patients. Of 24 (16,2%) patients having EBV, 14 (58,3%) had it alone and 10 (41,7%) – in association with HPV-16, 31, HHV-6 and cytomegalovirus. HHV-6 was found in 12 (8,1%) cases, in 8 (67%) of them – in association with types 16, 31 and EBV. Cytomegalovirus was detected in 4 (2,7%) patients, in 2 of them – in association with EBV. Conclusions: Vulvar cancer patients are often infected with not only HPV of different genotypes but also EBV, HHV-6 and cytomegalovirus. Thus, presence of different viral agents in vulvar cancer patients should be taken into account as it underlies one of vulvar cancer pathogenesis variants, which requires further study. Disclosure: All authors have declared no conflicts of interest.