A cost-effectiveness analysis of four management strategies in the determination and follow-up of atypical squamous cells of undetermined significance

Comparison of immediate colposcopy, repeat conventional cytology and hrHPV testing for the clinical management of ASC-US cytology in routine health services of Medellin, Colombia: The ASCUS-COL Trial

In the context of opportunistic cervical cancer screening settings of low-and-middle-income countries, little is known about the benefits of high-risk human papillomavirus (hrHPV) testing on high-grade cervical abnormality detection among women with atypical squamous cells of undetermined significance (ASC-US) cytology in routine clinical practice. We compared the effectiveness of immediate colposcopy (IC), conventional cytology at 6 and 12 months (colposcopy if ≥ASC-US) (RC), and hrHPV testing (colposcopy if hrHPV-positive) (HPV) to detect cervical intraepithelial neoplasia grade 2 or more severe diagnoses (CIN2+) among women aged 20-69 years with ASC-US in routine care. Participants (n=2,661) were evenly randomized into three arms (n=882 IC, n=890 RC, n=889 HPV) to receive services by routine healthcare providers and invited to an exit visit 24 months after recruitment. Histopathology was blindly reviewed by a quality-control external panel (QC). The primary endpoint was the first QC-diagnosed CIN2+ or CIN3+ detected during three periods: enrolment (≤6 months for IC and HPV, ≤12 months for RC), follow-up (between enrolment and exit visit), and exit visit. The trial is completed. Colposcopy was done on 88%, 42%, and 52% of participants in IC, RC, and HPV. Overall, 212 CIN2+ and 52 CIN3+ cases were diagnosed. No differences were observed for CIN2+ detection (p=0.821). However, compared to IC, only HPV significantly reduced CIN3+ cases that providers were unable to detect during the 2-year routine follow-up (relative proportion 0.35, 95% CI 0.09-0.87). In this context, hrHPV testing was the most effective and efficient management strategy for women with ASC-US cytology.

An economic analysis of human papillomavirus triage for the management of women with atypical and abnormal Pap smear results in Germany

We developed decision-analytic models to determine the cost effectiveness of incorporating human papillomavirus (HPV) testing into the management of atypical and abnormal Pap smear results in Germany. The models compare three management strategies: (1) repeat Pap smear, (2) triage with HPV DNA testing, or (3) immediate treatment. The primary outcome measure is incremental cost per case of cervical intraepithelial neoplasia (CIN) 2+ detected and treated. The models take the perspective of the German health system. For patients with initial PapIIw, III, and IIId results, incremental cost effectiveness ratios for HPV triage versus repeat Pap smears are 2,232 euro, 815 euro, and 487 euro per additional case of CIN2+ detected and treated. In addition, the number of cases of CIN2+ detected and treated in a hypothetical population of 1,000 women increases from 17 to 35, 61 to 130, and 157 to 332 for each population, respectively. For patients with initial PapIII and IIId results, immediate treatment of 1,000 patients detects only four and 11 additional cases of CIN2+ versus HPV triage at incremental cost effectiveness ratios of 39,684 euro and 10,716 euro per case, respectively. For each of the populations evaluated, HPV triage is the most cost-effective management strategy versus either repeat Pap smear or immediate treatment.

Human papillomavirus triage for young women with atypical squamous cells of undetermined significance

OBJECTIVE

Human papillomavirus testing is a cost-effective strategy for the management of atypical squamous cells of undetermined significance. Young women have a high prevalence of transient human papillomavirus infections and low incidence high-grade cervical lesions, which may limit the usefulness of human papillomavirus testing in this cohort. We sought to estimate the usefulness of human papillomavirus testing for young women with atypical squamous cells of undetermined significance.

METHODS

A retrospective study of women with atypical squamous cells of undetermined significance was undertaken. Reflex human papillomavirus results and pathologic follow-up were evaluated. Age-stratified rates of human papillomavirus positivity, rates of high-grade dysplasia, and sensitivity and specificity were estimated.

RESULTS

A total of 1,290 women with atypical squamous cells of undetermined significance cytology were identified. The rate of human papillomavirus positivity decreased with age from 55% for those aged 25 years or younger to 12% for women aged older than 50 years (P < .001). The cumulative rate of high-grade lesions increased with age; 12% for patients aged 25 years or younger compared with 24% for women aged older than 50 years (P = .05). A negative human papillomavirus test more effectively excluded high-grade disease in the young women. No high-grade lesions were detected in the human papillomavirus negative women aged 25 years or younger compared with 3.8% of those aged older than 50 years (P = .04). The sensitivity for detection of high-grade disease was higher in women aged younger than 25 years compared with those aged older than 50 years (100% compared with 50%), whereas specificity was lower (14% compared with 44%).

CONCLUSION

Given the high prevalence of human papillomavirus and low occurrence of high-grade lesions in young women with atypical squamous cells of undetermined significance, a human papillomavirus-based triage strategy will result in the referral of a large number of women for colposcopy and may limit its cost-effectiveness.

LEVEL OF EVIDENCE

III.

[ASCUS: an update]

A report of ASCUS is always confusing or painful to the clinician, as histological correlate of this diagnosis is wide, ranging from a totally normal cervix mucosa to infiltrating carcinoma; most of the time it is the result of benign inflammatory or reactive changes. This is the reason why this category has evolved since its introduction in the Bethesda system for reporting cervical cytology in 1988, to achieve a closer link to the lesional diagnosis. The most recent modification took place in 2001, to subcategorize the ASC into ASC-US and ASC-H. The present review provides guidelines to manage these diagnoses.