Time trends in human papillomavirus prevalence and genotype distribution in vulvar carcinoma in Norway

被引:2
作者
Meltzer-Gunnes, Christin Julia [1 ]
Lie, Agnes Kathrine [2 ,3 ]
Jonassen, Christine Genevieve Monceyron [3 ]
Rangberg, Anbjorg [3 ]
Nystrand, Camilla Furlund [3 ]
Smastuen, Milada Cvancarova [4 ]
Vistad, Ingvild [1 ]
机构
[1] Sorlandet Hosp HF, Dept Obstet & Gynecol, Serv Box 416, N-4604 Kristiansand, Norway
[2] Oslo Univ Hosp, Norwegian Radium Hosp, Dept Pathol, Oslo, Norway
[3] Ostfold Hosp HF, Ctr Lab Med, Gralum, Norway
[4] Oslo & Akershus Univ Coll Appl Sci, Dept Nursing & Hlth Promot, Oslo, Norway
关键词
human papillomavirus; prevalence; squamous cell carcinoma; survival; vulvar cancer; SQUAMOUS-CELL CARCINOMA; INTRAEPITHELIAL NEOPLASIA; PROGNOSTIC-SIGNIFICANCE; CANCER INCIDENCE; HPV; ATTRIBUTION; SURVIVAL; LESIONS; BURDEN; WOMEN;
D O I
10.1111/aogs.14702
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
IntroductionApproximately 25%-43% of all vulvar carcinomas are associated with human papillomavirus (HPV). In many countries, vulvar carcinoma incidence rates are increasing, possibly due to greater HPV exposure. However, studies exploring changes in HPV prevalence and genotype distribution in vulvar carcinoma over time are scarce. Our aim was to evaluate time trends in HPV prevalence and genotype distribution in vulvar squamous cell carcinoma in an unselected, nationwide sample of Norwegian women. Further, we explored clinical and histopathological aspects in relation to HPV status and investigated whether HPV status was associated with survival.Material and methodsAll vulvar squamous cell carcinoma cases from 1970-1975 and 2000-2005 were extracted from the Cancer Registry of Norway and corresponding tissue blocks were retrieved. After detailed histology review, HPV testing was conducted using real-time TaqMan PCR. Overall survival rates were calculated using the Kaplan-Meier method. Multivariable Cox regression analysis was performed to estimate hazard ratios adjusted for age at diagnosis, stage and diagnostic period.ResultsHistological review was performed on 352 vulvar squamous cell carcinoma cases. We were able to obtain valid HPV analysis results for 282 cases, Overall, 29.8% (95% CI 24.5%-35.5%) of cases were high-risk HPV (hrHPV)-positive. When comparing the two periods, we found that the percentage of hrHPV-positive tumors increased significantly from 23% (95% CI 16.0%-31.4%) in 1970-1975 to 35.3% (95% CI 27.8%-43.3%) in 2000-2005 (P = 0.025). The predominant genotypes were HPV 16 (73%), HPV 33 (21%), and HPV 18 (6%), with similar distributions in both periods. In the more recent cohort, several additional genotypes were detected: HPV 6, 11, 39, 45, 52, 58 and 66 were found in smaller percentages, ranging from 1.8% to 3.6%. In univariate analysis, patients with HPV-positive tumors showed improved overall survival compared with patients with HPV-negative tumors (hazard ratio [HR] 0.65, 95% CI 0.48-0.86).ConclusionsThe prevalence of HPV in vulvar squamous cell carcinomas in Norway was significantly higher in 2000-2005 than in 1970-1975. The three predominant genotypes were HPV 16, 33 and 18 in both time periods. However, several other HPV genotypes have emerged over the last decades. HPV-positivity was associated with better overall survival. When comparing HPV prevalence rates in Norwegian vulvar squamous cell carcinomas from 1970-1975 and 2000-2005, we found a significant increase over time. The three predominant genotypes were HPV 16, 33 and 18,- with similar distributions in both time periods. However, several additional HPV genotypes have emerged over the last decades.image
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页码:153 / 164
页数:12
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