HPV vaccination and malignancy risks beyond cervical cancer: A retrospective global cohort study

While HPV vaccination is well established for the prevention of cervical cancer, its broader oncological effects remain insufficiently characterized. Emerging evidence suggests potential protective effects against non-cervical malignancies; however, comprehensive long-term data are limited. We conducted a global, retrospective cohort study utilizing electronic health records from the TriNetX network. Individuals vaccinated against HPV at age 8 years or older were propensity score-matched to unvaccinated controls. Outcomes included the incidence of malignancies in the head-and-neck, gastrointestinal, anogenital, neuronal, and hematologic systems, as well as all-cause mortality, assessed over 8- and 20-year follow-up periods. Kaplan-Meier survival analysis and hazard ratios (HRs) were employed. HPV vaccination was associated with significant reductions in the risk of hypopharyngeal and laryngeal carcinomas (8-year HR: 0.19; 95 % CI: 0.057-0.631; p = 0.0025; 20-year HR: 0.227; 95 % CI: 0.067-0.764; p = 0.0092) and leukemia (8-year HR: 0.461; p = 0.0035; 20-year HR: 0.443; p = 0.0019). No significant protection was observed for rectal, anal, oral cavity, or prostate cancers. All-cause mortality was reduced by nearly half among vaccinated individuals (8-year HR: 0.543; 20-year HR: 0.536; both p < 0.0001). Beyond epithelial malignancies, HPV vaccination may confer systemic cancer protection, particularly in hematologic and potentially neuronal tissues. These findings suggest a broader biological impact of HPV vaccination than previously recognized and underscore the need for mechanistic studies investigating HPV's oncogenic pathways. If validated, these results could prompt the expansion of vaccination strategies to encompass broader indications and wider population coverage.