Switch from cytology-based to human papillomavirus test-based cervical screening: implications for colposcopy

Area of Science:

• Gynecology
• Oncology
• Public Health

Background:

• Cervical cancer prevention programs are shifting from cytology to more sensitive human papillomavirus (HPV) testing.
• This transition necessitates evaluating the clinical impact on colposcopy workload and diagnostic performance.

Purpose of the Study:

• To assess the implications of switching to HPV testing-based cervical cancer screening on colposcopy performance and workload.
• To compare HPV testing with cytology in identifying high-risk individuals for colposcopy.

Main Methods:

• Utilized data from the 7-year Guanacaste cohort study involving cytology, HPV DNA testing, and cervigrams.
• Employed cervigrams as a surrogate for colposcopy impression to evaluate predictive values for detecting cervical intraepithelial neoplasia (CIN) grades.
• Analyzed the impact of HPV testing on colposcopic impression distribution and referral patterns.

Main Results:

• HPV testing identifies more cumulative ≥cervical intraepithelial neoplasia grade 2 (CIN2) cases than cytology due to increased referrals.
• The proportion of women with visible lesions at colposcopy and the sensitivity/specificity trade-off of colposcopic impressions remain similar to cytology-based programs.
• A significant concern is managing the increased number of HPV-positive women, including those with non-visible CIN2 lesions.

Conclusions:

• While HPV testing enhances early detection of cervical abnormalities, it increases colposcopy referrals.
• Current colposcopic impression methods show similar performance regardless of screening type (HPV vs. cytology).
• There is a critical need for non-visual diagnostic tools to guide the management and treatment of HPV-positive women.