Potential impact of nonavalent HPV vaccine in the prevention of high-grade cervical lesions and cervical cancer in Portugal.

ABSTRACT

OBJECTIVE: To estimate the potential impact of the nonavalent HPV vaccine for high-grade cervical lesions and invasive cervical cancer (ICC) in Portugal. METHODS: The present secondary analysis used data collected in the CLEOPATRE II study on the prevalence of HPV 6/11/16/18/31/33/45/52/58 among female patients aged 20-88 years. The prevalence of HPV types in patients with cervical intraepithelial neoplasia (CIN) grades 2/3 and ICC was examined. RESULTS: Data were included from 582 patients. There were 177, 341, and 64 patients with CIN2, CIN3, and ICC, respectively, and 169 (95.5%), 339 (99.4%), and 62 (96.9) of them had HPV infections. Of patients with HPV infections, HPV 16, 18, 31, 33, 45, 52, and 58 infections were identified in 150 (88.8%), 329 (97.1%), and 60 (96.8%) patients with CIN2, CIN3, and ICC, respectively. HPV genotypes 6, 11, 16, 18, 31, 33, 45, 52, and 58 were identified in 540 (94.7%) of the patients with HPV infections. CONCLUSION: The addition of the five HPV genotypes included in the nonavalent HPV vaccine (HPV 31/33/45/52/58) could result in the new HPV vaccine preventing 94.7% of CIN2/3 and ICC occurrences.