Distribución de genotipos del virus del papiloma humano en una población de mujeres españolas no vacunadas con enfermedad de vulva y vagina

Vulvar and vaginal specimens were studied in order to determine the distribution of human papillomavirus (HPV) genotypes and co-infection occurrence. This information will contribute to the knowledge of HPV genotype distributions and provide an estimate of the prevalence of different oncogenic HPV genotypes found in patients in Madrid (Spain). A total of 86 vulvar and vaginal biopsies from the Hospital General Universitario Gregorio Marañón of Madrid were studied. These included 61 specimens with vulvar benign lesions (VBL), 5 usual vulvar intraepithelial lesions (u-VIN), 2 vulvar squamous cell carcinoma (VSCC), 9 vaginal benign lesions (VaBL), 4 vaginal intraepithelial lesions grade I (VaIN-I), 4 vaginal intraepithelial lesions grade II/III (VaIN-II/III) and one vaginal squamous cell carcinoma (VaSCC). HPV genotyping was performed with PCR amplification and reverse dot blot hybridization. 33 different HPV genotypes were detected, including 10 HPVs associated with a high risk of carcinogenesis, 2 HPVs associated with a highly likely risk of carcinogenesis and 5 HPVs associated with a low-risk of carcinogenesis. In 3 specimens, an uncharacteristic HPV genotype was detected. The most frequent HPV genotypes found were HPV-6 (10.3%; 95% CI: 6.6-15.1%), HPV-16 (8.5%; 95% CI: 5.2-13%) and HPV-11 (7.6%; 95% CI: 4.5-11.9%). HPV-18 was only detected in 0.9% (95% CI: 0.1-3.2%) of the total viruses detected in all lesions. HPV co-infections were found in 30.2% of all types of lesions. Benign lesions predominate in the pathology of the vulva and vagina. Although the presence of LR-HPVs is dominate among the BLV, the HR-HPVs are present in a significant number of cases.