Comparison of HPV-based assays with Papanicolaou smears for cervical cancer screening in Morelos State, Mexico

Unidad de Investigación Epidemiológica y en Servicios de Salud, Instituto Mexicano del Seguro Social, Morelos, México.
Cancer Causes and Control (Impact Factor: 2.74). 09/2003; 14(6):505-12. DOI: 10.1023/A:1024806707399
Source: PubMed


To compare the performance of human papillomavirus (HPV) assays with conventional Pap cytology for cervical cancer (CC) screening in Mexico.
Pap smears, self-collected vaginal specimens (SS) for HPV testing, and clinician-collected cervical specimens (CS) for HPV testing were obtained from 7868 women, aged 15-85 years old, attending CC screening at the Mexican Institute of Social Security (IMSS) between May and October, 1999. SS and CS specimens were screened for oncogenic HPV DNA by Hybrid Capture 2. Women who received cytological interpretations of atypical squamous cells of undetermined significance (ASCUS), and/or a positive HPV test were referred for colposcopy and histologic studies. The relative estimates for sensitivity, specificity and predictive values of each test were calculated using histological diagnoses of cervical intraepithelial neoplasia (CIN) grades 2 or 3, or CC histological diagnosis.
Oncogenic HPV detection rate was 11.6% for SS, and 9.3% for CS. Pap smear abnormalities were observed in 2.4% of the women. Of 1147 women who had at least one abnormal test result, 88.5% underwent colposcopy, and 101 biopsy-confirmed CIN2/3 or cancer cases were identified. The relative sensitivity estimates for the Pap test, SS and CS were 59.4% (95% CI: 49.2-68.9), 71.3% (95% CI: 61.3-79.6), and 93.1% (95% CI: 85.8-96.9), respectively, while the specificities were 98.3% (95% CI: 98.0-98.6), 89.2% (95% CI: 88.5-89.9), and 91.8% (95% CI: 91.2-92.4), respectively. The positive predictive values of Pap, SS and CS were 36.1, 9.1 and 14.9, the colposcopy referrals needed to detect a case of CIN2/3 or cancer were 2.8, 11.0 and 6.7, respectively.
Both HPV assays detected more cases of CIN2/3 or CC than Pap cytology alone. However, the HPV assays increased the number of colposcopy referrals. Our study suggests that HPV testing could be an effective way to improve the performance of CC screening.

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    • "Pap smear testing is the most commonly used screening procedure throughout the world for the diagnosis of cervical lesions. Nevertheless, some countries have already implemented the detection of HPV DNA [4] [5]. Genotyping of HPV allows the identification of women with persistent infection and consequently with an increased risk for malignant progression. "
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    ABSTRACT: Objective To determine human papillomavirus (HPV) genotypes and the physical status of HPV-16 DNA among women from northern Portugal with cervical lesions. Methods The present retrospective study included samples of cervical exfoliated cells from 88 women (median age 42.0 ± 13.1 years) who attended the Gynecology Service at the Portuguese Institute of Oncology in Porto during 2010. After DNA extraction, HPV genotyping was performed by polymerase chain reaction (PCR) followed by restriction fragment length polymorphism analysis using the MY09/MY11 primers. The physical status of HPV-16 was determined by real-time PCR. Results Overall, 69.3% of the samples tested positive. The prevalence of HPV infection was 38.5% in normal samples, 57.7% in cervicitis samples, and 87.2% in all cervical lesions including invasive cancers. Sixteen genotypes were detected, the most prevalent ones being HPV-16 (42.9%), HPV-31 (12.2%), and HPV-58 (10.2%); HPV-18 was rare. The overall prevalence of HPV-16 integration was 31.6%. The physical status of HPV-16 did not differ significantly by histology. Conclusion The most frequent genotypes were HPV-16, -31, and -58. Integration of HPV-16 DNA seemed to be an early event in cervical carcinogenesis. Further studies are required to clarify the value of viral integration as a prognostic marker.
    International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics 05/2014; 125(2). DOI:10.1016/j.ijgo.2013.10.011 · 1.54 Impact Factor
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    • "to sampling errors (Belinson et al., 2001; Belinson et al., 2003; Garcia et al., 2003; Salmerón et al., 2003). Consequently, cytodiagnostic tests using self-collected specimens are not recommended by the Japan Society of Obstetrics and Gynecology. "
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    ABSTRACT: Object: In the present study, we compared the positive cytodiagnostic test rates with discrepancies using self-collection devices for cervical cancer screening. We made this survey to examine whether or not our self- smear preparation method using the Kato self-collection device contributed to an improved rate of detecting atypical cells compared with existing recommended preparation methods. Methods: Specimens were collected at 14 facilities handling self-collection methods, and samples were collected by a physician in 2 facilities. The chi- squared test was performed using the SPSS ver. 20 statistical software to determine the relationships between the positive cytodiagnostic rate, specimen preparation methods, and self-collection devices. Results: Collecting cells using the Kato self-collection device and preparing liquid-based specimens, we obtained a significantly higher rate of positive cytodiagnosis and our results were equal to those obtained with the direct method. Conclusions: Taking into consideration increased needs for screening using the self-collection method in future, with even more improved test accuracy, a screening test that is acceptable to society needs to be established.
    Asian Pacific journal of cancer prevention: APJCP 09/2012; 13(9):4521-4. DOI:10.7314/APJCP.2012.13.9.4521 · 2.51 Impact Factor
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    • "HPV molecular detection has been implemented in several countries and it was already proposed as the primary test for screening by replacing the Pap smear test [9] [10] [11]. Whereas HPV DNA tests have higher negative predictive value and sensitivity than conventional Pap smear but poor positive predictive value for identifying women with LSIL or cancer [9] [10] [11], they may be extremely useful in the identification of women with none or low risk of developing intraepithelial lesions [12]. Nevertheless, HPV genotyping may be considered a more important methodology than detection only, since it helps to identify the persistent infections which are predictive of HPV infection outcome (development of intraepithelial lesions or cervical cancer). "
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    ABSTRACT: This study aimed to characterize the HPV infection status in adolescents and young university women in Portugal. The distribution of HPV genotypes was evaluated by PCR DNA genotyping after self-sampling collection from 435 women of exfoliated cervical cells using a commercial kit. We observed an overall frequency of HPV infection of 11.5%. Furthermore, HPV DNA prevalence was 16.6% in those young women that self-declared as sexually active. The more frequently detected HPV types were 31, 16, 53, and 61. Statistical analysis identified median age (OR = 3.56; P = 0.001), the number of lifetime sexual partners (OR = 4.50; P < 0.001), and years of sexual activity (OR = 2.36; P = 0.008) as risk factors for HPV acquisition. Hence, our study revealed that oncogenic HPV infection is common in young asymptomatic women Portuguese women, with a history of 2-5 sexual partners and over 2 year of sexual activity. Moreover, these results demonstrate that HPV detection performed in self-collected samples may be important to appraise better preventive strategies and to monitorize the influence of vaccination programmes within different populations.
    Journal of Oncology 11/2011; 2011(1):953469. DOI:10.1155/2011/953469
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