HPV genotyping and HPV16 variant analysis in glandular and squamous neoplastic lesions of the uterine cervix

Abstract

Objective: The objective of the study was to compare the distribution of HPV genotypes and HPV16 variants in glandular and squamous cervical neoplasia.

Methods: Cases of endocervical adenocarcinoma in-situ (AIS, n=33) invasive adenocarcinoma (ADCA, n=55), cervical intraepithelial neoplasia-3 (CIN3, n=130) and squamous cell carcinoma (SCC, n=60) were collected at the New York Hospital and tested for HPV using SPF(10)PCR-LIPA(25) (version 1) assays and for HPV16 variants using a multiplex PCR and reverse hybridization assay.

Results: There was a difference between the spectrum of HPV genotypes detected in glandular and squamous neoplasia: 13 different HPV genotypes were detected in CIN3 as single infections and 11 in SCC, while only 4 single genotypes were detected in AIS and 3 in ADCA. The most common single HPV types in CIN3 were HPV16, 31, and 52 (56.9%, 10%, 8.4%, respectively). In SCC the most common were HPV16, 18 and 31 (70%, 6.5%, 4.9%). In AIS, HPV16, 18, 45 and 35 accounted for 69.7%, 27.2%, 3%, 3% of cases. The three single types in ADCA were HPV16 (43.6%), HPV18 (41.8%) and HPV45 (10.9%). European variants of HPV16 were the most common in CIN3 (83.8%), SCC (71.4%) and AIS (73.9%). In ADCA the Asian American (AA) variant was the most common (41.7%) followed by European variants (33.3%). AA variant was also detected in 17.4%, 4.1%, and 2.4% of HPV16 positive AIS, CIN3 and SCC, respectively.

Conclusion: Asian American variant of HPV16, HPV18 and HPV45 are preferentially associated with cervical adenocarcinoma as compared to squamous cell carcinoma.