Human papillomavirus as a favorable prognostic biomarker in squamous cell carcinomas of the vagina

Immaculada Alonso, Ana Felix, Aureli Torné, Victoria Fusté, Marta Del Pino, Paola Castillo, Juan Balasch, Jaume Pahisa, Jose Rios, Jaume Ordi

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Objective: Recent evidence has confirmed two independent pathways in the development of vaginal squamous cell carcinoma (VaSCC): one related to and the other independent of human papillomavirus (HPV). The aim of our study was to evaluate whether HPV status has prognostic significance in this neoplasm. Methods: All confirmed primary VaSCCs diagnosed and treated from 1995 to 2009 in two institutions were retrospectively evaluated (n = 57). HPV infection was detected by PCR using SPF-10 primers and typed with the INNO-LIPA HPV assay and p16 INK4a expression by immunohistochemistry. Disease-free and overall survival (DFS and OS) were analyzed by Kaplan-Meier analysis with the log-rank test and a multivariate Cox proportional hazard's model. Results: HR-HPV DNA was detected in 70.2% patients. HPV16 was the most prevalent genotype (67.5% of cases). p16 INK4a was positive in 97.5% HPV-positive and 17.6% HPV-negative tumors (p <.001). FIGO stage was associated with DFS (p =.042) and OS (p =.008). HPV-positive tumors showed better DFS (p =.042) and OS (p =.035) than HPV-negative tumors. Multivariate analysis confirmed better DFS and OS of HPV-positive patients independent of age and stage. This reduced risk of progression and mortality in HPV-positive patients was limited to women with FIGO stages I and II tumors (HR = 0.26; 95% CI 0.10-0.69; p = 0.006). Conclusions: HPV-positive early stage (FIGO I and II) VaSCCs have a better prognosis than early HPV-negative tumors. HPV detection and/or p16 INK4a immunostaining can be easily implemented in routine pathology and should be considered as valuable prognostic biomarkers in the study of patients with VaSCC.

Original languageEnglish
Pages (from-to)194-199
Number of pages6
JournalGynecologic Oncology
Volume125
Issue number1
DOIs
Publication statusPublished - 1 Apr 2012

Keywords

  • Human papillomavirus
  • Prognosis
  • Squamous cell carcinoma
  • Vagina

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