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Hu L, Mwanahamuntu MH, Sahasrabuddhe VV, Barrett C, Horning MP, Shah I, Laverriere Z, Banik D, Ji Y, Shibemba AL, Chisele S, Munalula MK, Kaunga F, Musonda F, Malyangu E, Hariharan KM, Parham GP. Internal validation of Automated Visual Evaluation (AVE) on smartphone images for cervical cancer screening in a prospective study in Zambia. Cancer Med 2024; 13:e7355. [PMID: 38872398 PMCID: PMC11176573 DOI: 10.1002/cam4.7355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 05/20/2024] [Accepted: 05/26/2024] [Indexed: 06/15/2024] Open
Abstract
OBJECTIVES Visual inspection with acetic acid (VIA) is a low-cost approach for cervical cancer screening used in most low- and middle-income countries (LMICs) but, similar to other visual tests, is subjective and requires sustained training and quality assurance. We developed, trained, and validated an artificial-intelligence-based "Automated Visual Evaluation" (AVE) tool that can be adapted to run on smartphones to assess smartphone-captured images of the cervix and identify precancerous lesions, helping augment VIA performance. DESIGN Prospective study. SETTING Eight public health facilities in Zambia. PARTICIPANTS A total of 8204 women aged 25-55. INTERVENTIONS Cervical images captured on commonly used low-cost smartphone models were matched with key clinical information including human immunodeficiency virus (HIV) and human papillomavirus (HPV) status, plus histopathology analysis (where applicable), to develop and train an AVE algorithm and evaluate its performance for use as a primary screen and triage test for women who are HPV positive. MAIN OUTCOME MEASURES Area under the receiver operating curve (AUC); sensitivity; specificity. RESULTS As a general population screening tool for cervical precancerous lesions, AVE identified cases of cervical precancerous and cancerous (CIN2+) lesions with high performance (AUC = 0.91, 95% confidence interval [CI] = 0.89-0.93), which translates to a sensitivity of 85% (95% CI = 81%-90%) and specificity of 86% (95% CI = 84%-88%) based on maximizing the Youden's index. This represents a considerable improvement over naked eye VIA, which as per a meta-analysis by the World Health Organization (WHO) has a sensitivity of 66% and specificity of 87%. For women living with HIV, the AUC of AVE was 0.91 (95% CI = 0.88-0.93), and among those testing positive for high-risk HPV types, the AUC was 0.87 (95% CI = 0.83-0.91). CONCLUSIONS These results demonstrate the feasibility of utilizing AVE on images captured using a commonly available smartphone by nurses in a screening program, and support our ongoing efforts for moving to more broadly evaluate AVE for its clinical sensitivity, specificity, feasibility, and acceptability across a wider range of settings. Limitations of this study include potential inflation of performance estimates due to verification bias (as biopsies were only obtained from participants with visible aceto-white cervical lesions) and due to this being an internal validation (the test data, while independent from that used to develop the algorithm was drawn from the same study).
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Affiliation(s)
- Liming Hu
- Global Health Labs, Inc.BellevueWashingtonUSA
| | | | | | - Caroline Barrett
- Clinton Health Access Initiative (CHAI), Inc.,BostonMassachusettsUSA
| | | | - Ishan Shah
- Global Health Labs, Inc.BellevueWashingtonUSA
| | | | | | - Ye Ji
- Global Health Labs, Inc.BellevueWashingtonUSA
| | | | | | | | | | | | | | | | - Groesbeck P. Parham
- University Teaching HospitalLusakaZambia
- University of North Carolina at Chapel HillChapel HillNorth CarolinaUSA
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Hu L, Mwanahamuntu MH, Sahasrabuddhe VV, Barrett C, Horning MP, Shah I, Laverriere Z, Banik D, Ji Y, Shibemba AL, Chisele S, Munalula MK, Kaunga F, Musonda F, Malyangu E, Hariharan KM, Parham GP. Internal Validation of Automated Visual Evaluation (AVE) on Smartphone Images for Cervical Cancer Screening in a Prospective Study in Zambia. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2023.07.19.23292888. [PMID: 37560093 PMCID: PMC10407974 DOI: 10.1101/2023.07.19.23292888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
Objectives Visual inspection with acetic acid (VIA) is a low-cost approach for cervical cancer screening used in most low- and middle-income countries (LMICs) but, similar to other visual tests like histopathology, is subjective and requires sustained training and quality assurance. We developed, trained, and validated an artificial-intelligence-based "Automated Visual Evaluation" (AVE) tool that can be adapted to run on smartphones to assess smartphone-captured images of the cervix and identify precancerous lesions, helping augment performance of VIA. Design Prospective study. Setting Eight public health facilities in Zambia. Participants 8,204 women aged 25-55. Interventions Cervical images captured on commonly used low-cost smartphone models were matched with key clinical information including human immunodeficiency virus (HIV) and human papillomavirus (HPV) status, plus histopathology analysis (where applicable), to develop and train an AVE algorithm and evaluate its performance for use as a primary screen and triage test for women who are HPV positive. Main outcome measures Area under the receiver operating curve (AUC); sensitivity; specificity. Results As a general population screening for cervical precancerous lesions, AVE identified cases of cervical precancerous and cancerous (CIN2+) lesions with high performance (AUC = 0.91, 95% confidence interval [CI] = 0.89 to 0.93), which translates to a sensitivity of 85% (95% CI = 81% to 90%) and specificity of 86% (95% CI = 84% to 88%) based on maximizing the Youden's index. This represents a considerable improvement over VIA, which a meta-analysis by the World Health Organization (WHO) estimates to have sensitivity of 66% and specificity of 87%. For women living with HIV, the AUC of AVE was 0.91 (95% CI = 0.88 to 0.93), and among those testing positive for high-risk HPV types, the AUC was 0.87 (95% CI = 0.83 to 0.91). Conclusions These results demonstrate the feasibility of utilizing AVE on images captured using a commonly available smartphone by screening nurses and support our transition to clinical evaluation of AVE's sensitivity, specificity, feasibility, and acceptability across a broader range of settings. The performance of the algorithm as reported may be inflated, as biopsies were obtained only from study participants with visible aceto-white cervical lesions, which can lead to verification bias; and the images and data sets used for testing of the model, although "unseen" by the algorithm during training, were acquired from the same set of patients and devices, limiting the study to that of an internal validation of the AVE algorithm.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Ye Ji
- Global Health Labs, Inc, USA
| | | | | | | | | | | | | | | | - Groesbeck P Parham
- University Teaching Hospital, Zambia
- University of North Carolina at Chapel Hill, USA
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Chongsuwat T, Wang C, Sohn Y, Klump K. Digital cervicography for cervical cancer screening in low-resource settings: A scoping review. Gynecol Oncol Rep 2023; 45:101130. [PMID: 36683777 PMCID: PMC9845952 DOI: 10.1016/j.gore.2022.101130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/20/2022] [Accepted: 12/23/2022] [Indexed: 01/05/2023] Open
Abstract
Introduction Digital cervicography (DC) is a method of capturing images for analysis during visual inspection with acetic acid (VIA) for cervical cancer screening. Cervical cancer is the 3rd leading cause of female cancer in the world with approximately 90 % of deaths due to cervical cancer occurring in low and middle income countries (LMICs). The need for cost-effective and sustainable methods for screening is vital in these settings. This scoping review systematically synthesizes published data illustrating the use of DC in screening programs. We aim to understand how digital cervicography is used, implemented, and impacted on programs. Methods Search of eight online databases identified 53 studies published between 1993 and 2021. Inclusion of articles were English language, cervical cancer screening program located in an LMIC, and DC as an intervention. Results All studies were cross-sectional studies (n = 53), with variation in terminology, uses, and device methods. Devices were grouped as either smartphones (n = 14), commercially available digital cameras (n = 17), or other (EVA®, n = 4; Cerviscope, n = 12; custom device, n = 4; or not specified, n = 2). Nineteen studies found acceptability and feasibility for DC in their screening programs. Various programs using DC found benefits such as task sharing, healthcare worker training, patient education and using images for review from a remote specialist or mentor. Conclusion The use of DC in LMICs is beneficial for support of healthcare workers, enhances quality improvement and demonstrates overall acceptability in screening programs. Advancing technologies for human papillomavirus (HPV) testing and cytology are common methods for cervical cancer screening, although are limited in LMICs. This scoping review demonstrates the different methods, uses, and benefit of digital cervicography in cervical cancer screening programs.
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Affiliation(s)
- Tana Chongsuwat
- University of Wisconsin School of Medicine and Public Health, 1100 Delaplaine Ct, Madison, WI 53715, United States,Corresponding author at: 1100 Delaplaine Ct, Madison, WI 53715, United States.
| | - Connor Wang
- University of Wisconsin School of Medicine and Public Health, 1100 Delaplaine Ct, Madison, WI 53715, United States
| | - Younji Sohn
- University of Oklahoma College of Medicine, 900 NE 10th St, Oklahoma City, OK 73104, United States
| | - Kathryn Klump
- University of Oklahoma College of Medicine, 900 NE 10th St, Oklahoma City, OK 73104, United States
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Kelly H, Jaafar I, Chung M, Michelow P, Greene S, Strickler H, Xie X, Schiffman M, Broutet N, Mayaud P, Dalal S, Arbyn M, de Sanjosé S. Diagnostic accuracy of cervical cancer screening strategies for high-grade cervical intraepithelial neoplasia (CIN2+/CIN3+) among women living with HIV: A systematic review and meta-analysis. EClinicalMedicine 2022; 53:101645. [PMID: 36187721 PMCID: PMC9520209 DOI: 10.1016/j.eclinm.2022.101645] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND We systematically reviewed the diagnostic accuracy of cervical cancer screening and triage strategies in women living with HIV (WLHIV). METHODS Cochrane Library, Embase, Global Health and Medline were searched for randomised controlled trials, prospective or cross-sectional studies published from database inception to 15 July 2022 reporting diagnostic accuracy of tests in cervical cancer screening and triage of screen-positive WLHIV. Studies were included if they reported the diagnostic accuracy of any cervical cancer screening or triage strategies for the detection of histologically-confirmed high-grade cervical intraepithelial neoplasia (CIN2+/CIN3+) among WLHIV. Summary data were extracted from published reports. Authors were contacted for missing data where applicable. Sensitivity and specificity estimates for CIN2/3+ were pooled using models for meta-analysis of diagnostic accuracy data. Study quality was assessed using the QUADAS-2 tool for the quality assessment of diagnostic accuracy studies. PROSPERO registration:CRD42020189031. FINDINGS In 38 studies among 18,737 WLHIV, the majority (n=19) were conducted in sub-Saharan Africa. The pooled prevalence was 12.0% (95%CI:9.8-14.1) for CIN2+ and 6.7% (95%CI:5.0-8.4) for CIN3+. The proportion of screen-positive ranged from 3-31% (visual inspection using acetic acid[VIA]); 2-46% (high-grade squamous intraepithelial lesions, and greater [HSIL+] cytology); 20-64% (high-risk[HR]-HPV DNA). In 14 studies, sensitivity and specificity of VIA were variable limiting the reliability of pooled estimates. In 5 studies where majority had histology-confirmed CIN2+, pooled sensitivity was 56.0% (95%CI:45.4-66.1; I2=65%) for CIN2+ and 65.0% (95%CI:52.9-75.4; I2 =42%) for CIN3+; specificity for <CIN2 was 73.8% (95%CI:59.8-84.2, I2=94%). Cytology was similarly variable (sensitivity of ASCUS+ for CIN2+ range: 58-100%; specificity: 9-96%). In 28 studies, sensitivity of tests targeting 14-HR-HPV types was high (91.6%, 95%CI:88.1-94.1; I2=45% for CIN2+ and 92.5%, 95%CI:88.4-95.2; I2=32%) for CIN3+); but specificity for <CIN2 was low (62.2% (95%CI:57.9-66.4;I2=92%). Restriction to 8-HR-HPV increased specificity (65.8%; Relative specificity[RSpec] vs. 14-HR-HPV=1.17; 95%CI:1.10-1.24) with no significant change in sensitivity (CIN2+:85.5%; Relative Sensitivity[RSens]=0.94, 95%CI: 0.89-1.00; CIN3+:90%; RSens=0.96, 95%CI:0.89-1.03). VIA triage of 14-HR-HPV positive women decreased sensitivity for CIN2+ compared to HPV-DNA test alone (64.4% vs. 91.6%; RSens=0.68, 95%CI:0.62-0.75). INTERPRETATION HPV-DNA based approaches consistently showed superior sensitivity for CIN2+/CIN3+ compared to VIA or cytology. The low specificity of HPV-DNA based methods targeting up to 14-HR-HPV could be improved significantly by restricting to 8-HR-HPV with only minor losses in sensitivity, limiting requirement for triage for which optimal approaches are less clear. FUNDING World Health Organisation; National Cancer Institute; European Union's Horizon 2020 and Marie Skłodowska-Curie Actions programme.
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Affiliation(s)
- Helen Kelly
- London School of Hygiene and Tropical Medicine, London, United Kingdom
- National Cancer Institute, National Institutes of Health, Rockville, MD, USA
- Corresponding author at: London School of Hygiene and Tropical Medicine, London, United Kingdom.
| | - Iman Jaafar
- Unit of Cancer Epidemiology, Belgian Cancer Centre, Sciensano, Brussels, Belgium
| | - Michael Chung
- Department of Global Health, University of Washington, Seattle, USA
| | - Pamela Michelow
- Cytology Unit, Department of Anatomical Pathology, Faculty of Health Science, National Health Laboratory Service, University of the Witwatersrand, Johannesburg, South Africa
| | - Sharon Greene
- Department of Global Health, University of Washington, Seattle, USA
| | - Howard Strickler
- Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY, USA
| | - Xianhong Xie
- Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY, USA
| | - Mark Schiffman
- National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Nathalie Broutet
- Department of Global HIV, Hepatitis and STIs Programmes, World Health Organization, Geneva, Switzerland
| | - Philippe Mayaud
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Shona Dalal
- Department of Global HIV, Hepatitis and STIs Programmes, World Health Organization, Geneva, Switzerland
| | - Marc Arbyn
- Unit of Cancer Epidemiology, Belgian Cancer Centre, Sciensano, Brussels, Belgium
- Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, University Ghent, Ghent, Belgium
| | - Silvia de Sanjosé
- National Cancer Institute, National Institutes of Health, Rockville, MD, USA
- ISGlobal, Barcelona, Spain
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Effah K, Wormenor MC, Tekpor E, Amuah JE, Atuguba HB, Mensah ENO, Badzi ES, Danyo S, Agyiri D, Klutsey GB, Akakpo PK. Mobile colposcopy by trained nurses in a cervical cancer screening programme at Battor, Ghana. Ghana Med J 2022; 56:141-151. [PMID: 37448995 PMCID: PMC10336638 DOI: 10.4314/gmj.v56i3.3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2024] Open
Abstract
OBJECTIVES Cervical precancer screening programs are difficult to establish in low resource settings partly because of a lack of human resource. Our aiming was to overcome this challenge. We hypothesized that this could be done through task shifting to trained nurses. DESIGN Descriptive retrospective cross-sectional review. SETTING Training was at the Cervical Cancer Prevention and Training Center (CCPTC) and screening was carried out at the clinic and at outreaches / peripheral facilities. PARTICIPANTS All women who reported to the clinic for screening or were recruited during outreaches. INTERVENTIONS All 4 nurses were trained for at least 2weeks (module 1). A total of 904 women were screened by the trained nurses using the EVA system. Quality assurance was ensured. MAIN OUTCOME MEASURES Primary screening and follow-up were carried out by the trained nurses with quality assured through image sharing and meetings with peers and experienced gynaecologists. RESULTS 828 women had primary screening and 76 had follow-up screening. 739 (89.3%) were screened at the clinic and 89 (10.7%) at outreaches/peripheral facilities. Of all screened, 130 (14.5%) had cervical lesions, and 25 (2.8%) were treated, 12 (48.0%) by Loop Electrosurgical Excision Procedure (LEEP) performed by a gynaecologist, 11 (44.0%) with thermal coagulation by trained nurses except one, and 2 (8.0%) with cryotherapy by trained nurses. CONCLUSION We demonstrate the utility of a model where nurses trained in basic colposcopy can be used to successfully implement a cervical precancer screening and treatment program in low-resource settings. FUNDING None indicated.
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Affiliation(s)
| | | | | | - Joseph E Amuah
- Catholic Hospital, Battor, Ghana
- School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | | | | | - Ewoenam S Badzi
- Department of Public Health, The Salvation Army Hospital, Agona-Duakwa, Ghana
| | | | | | | | - Patrick K Akakpo
- Department of Pathology, School of Medical Sciences, University of Cape Coast, Cape Coast Teaching Hospital, Cape Coast, Ghana
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Gomes MLDS, Vieira NFC, Sousa DMDN, Moura NDS, Rodrigues IR, Rodrigues DP, Silva BGS, Oriá MOB. Health outcomes in women attending with clinical guideline PROGYNE to a primary care center for cervical cancer prevention. J Obstet Gynaecol Res 2021; 47:4371-4380. [PMID: 34505333 DOI: 10.1111/jog.15017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 08/04/2021] [Accepted: 08/28/2021] [Indexed: 12/24/2022]
Abstract
AIM The objective of the current study was to analyze the health outcomes of women attending with a clinical guideline to consultations for cervical cancer (CC) prevention in a primary care center. METHODS A cross-sectional design was used, and data were collected from March to July 2016 with a sample of 87 women in Fortaleza, Brazil. RESULTS The following correlations were found: previous history of sexually transmitted infection (p = 0.025), women who used oral contraceptives (p = 0.035), and undergo the Papanicolaou test annually; having black skin color (p = 0.031) and attending to the first gynecological consultation; being single (p = 0.031), family history of cancer (p < 0.001), and undergoing the first Papanicolaou test within the first 3 years of sexual activity; age up to 30 years and positive colposcopy (p = 0.027); and being single and positive colposcopy (p = 0.021). CC was characterized by the presence of intraepithelial lesion detected on colposcopy (gold standard). Receiver operating characteristic curves were used to evaluate the diagnostic accuracy of visual inspection with Lugol's iodine, digital cervicography, and Papanicolaou test. The area under the curve values were as follows: digital cervicography: 0.558, p = 0.509; Lugol's iodine: 0.491, p = 0.919; and Papanicolaou test: 0.697, p = 0.024. CONCLUSION Colposcopy in primary care provided a faster diagnosis of pre-cancerous lesions. Understanding the health outcomes of women who underwent consultations for CC prevention, as well as the screening and diagnosis methods used, is essential to the service and national health system of the less developed countries.
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Kelly HA, Chikandiwa A, Sawadogo B, Gilham C, Michelow P, Lompo OG, Omar T, Zan S, Magooa P, Segondy M, Nagot N, Meda N, Delany-Moretlwe S, Mayaud P. Diagnostic accuracy of cervical cancer screening and screening-triage strategies among women living with HIV-1 in Burkina Faso and South Africa: A cohort study. PLoS Med 2021; 18:e1003528. [PMID: 33661957 PMCID: PMC7971880 DOI: 10.1371/journal.pmed.1003528] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 03/18/2021] [Accepted: 12/22/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Cervical cancer screening strategies using visual inspection or cytology may have suboptimal diagnostic accuracy for detection of precancer in women living with HIV (WLHIV). The optimal screen and screen-triage strategy, age to initiate, and frequency of screening for WLHIV remain unclear. This study evaluated the sensitivity, specificity, and positive predictive value of different cervical cancer strategies in WLHIV in Africa. METHODS AND FINDINGS WLHIV aged 25-50 years attending HIV treatment centres in Burkina Faso (BF) and South Africa (SA) from 5 December 2011 to 30 October 2012 were enrolled in a prospective evaluation study of visual inspection using acetic acid (VIA) or visual inspection using Lugol's iodine (VILI), high-risk human papillomavirus DNA test (Hybrid Capture 2 [HC2] or careHPV), and cytology for histology-verified high-grade cervical intraepithelial neoplasia (CIN2+/CIN3+) at baseline and endline, a median 16 months later. Among 1,238 women (BF: 615; SA: 623), median age was 36 and 34 years (p < 0.001), 28.6% and 49.6% ever had prior cervical cancer screening (p < 0.001), and 69.9% and 64.2% were taking ART at enrolment (p = 0.045) in BF and SA, respectively. CIN2+ prevalence was 5.8% and 22.4% in BF and SA (p < 0.001), respectively. VIA had low sensitivity for CIN2+ (44.7%, 95% confidence interval [CI] 36.9%-52.7%) and CIN3+ (56.1%, 95% CI 43.3%-68.3%) in both countries, with specificity for ≤CIN1 of 78.7% (95% CI 76.0%-81.3%). HC2 had sensitivity of 88.8% (95% CI 82.9%-93.2%) for CIN2+ and 86.4% (95% CI 75.7%-93.6%) for CIN3+. Specificity for ≤CIN1 was 55.4% (95% CI 52.2%-58.6%), and screen positivity was 51.3%. Specificity was higher with a restricted genotype (HPV16/18/31/33/35/45/52/58) approach (73.5%, 95% CI 70.6%-76.2%), with lower screen positivity (33.7%), although there was lower sensitivity for CIN3+ (77.3%, 95% CI 65.3%-86.7%). In BF, HC2 was more sensitive for CIN2+/CIN3+ compared to VIA/VILI (relative sensitivity for CIN2+ = 1.72, 95% CI 1.28-2.32; CIN3+: 1.18, 95% CI 0.94-1.49). Triage of HC2-positive women with VIA/VILI reduced the number of colposcopy referrals, but with loss in sensitivity for CIN2+ (58.1%) but not for CIN3+ (84.6%). In SA, cytology high-grade squamous intraepithelial lesion or greater (HSIL+) had best combination of sensitivity (CIN2+: 70.1%, 95% CI 61.3%-77.9%; CIN3+: 80.8%, 95% CI 67.5%-90.4%) and specificity (81.6%, 95% CI 77.6%-85.1%). HC2 had similar sensitivity for CIN3+ (83.0%, 95% CI 70.2%-91.9%) but lower specificity compared to HSIL+ (42.7%, 95% CI 38.4%-47.1%; relative specificity = 0.57, 95% CI 0.52-0.63), resulting in almost twice as many referrals. Compared to HC2, triage of HC2-positive women with HSIL+ resulted in a 40% reduction in colposcopy referrals but was associated with some loss in sensitivity. CIN2+ incidence over a median 16 months was highest among VIA baseline screen-negative women (2.2%, 95% CI 1.3%-3.7%) and women who were baseline double-negative with HC2 and VIA (2.1%, 95% CI 1.3%-3.5%) and lowest among HC2 baseline screen-negative women (0.5%, 95% CI 0.1%-1.8%). Limitations of our study are that WLHIV included in the study may not reflect a contemporary cohort of WLHIV initiating ART in the universal ART era and that we did not evaluate HPV tests available in study settings today. CONCLUSIONS In this cohort study among WLHIV in Africa, a human papillomavirus (HPV) test targeting 14 high-risk (HR) types had higher sensitivity to detect CIN2+ compared to visual inspection but had low specificity, although a restricted genotype approach targeting 8 HR types decreased the number of unnecessary colposcopy referrals. Cytology HSIL+ had optimal performance for CIN2+/CIN3+ detection in SA. Triage of HPV-positive women with HSIL+ maintained high specificity but with some loss in sensitivity compared to HC2 alone.
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Affiliation(s)
- Helen A. Kelly
- Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), L’Hospitalet de Llobregat, Barcelona, Spain
- London School of Hygiene & Tropical Medicine, London, United Kingdom
- * E-mail:
| | - Admire Chikandiwa
- Wits Reproductive Health and HIV Institute, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Bernard Sawadogo
- Centre de Recherche Internationale en Santé, University of Ouagadougou, Burkina Faso
| | - Clare Gilham
- London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Pamela Michelow
- Department of Anatomical Pathology, University of the Witwatersrand, Johannesburg, South Africa
- National Health Laboratory Service, Johannesburg, South Africa
| | - Olga Goumbri Lompo
- Centre de Recherche Internationale en Santé, University of Ouagadougou, Burkina Faso
| | - Tanvier Omar
- Department of Anatomical Pathology, University of the Witwatersrand, Johannesburg, South Africa
- National Health Laboratory Service, Johannesburg, South Africa
| | - Souleymane Zan
- Department of Gynaecology, Centre Hospitalier Universitaire Yalgado, Ouagadougou, Burkina Faso
| | - Precious Magooa
- Sexually Transmitted Infections Reference Centre, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa
| | | | - Nicolas Nagot
- UMR1058, Montpellier University, Montpellier, France
| | - Nicolas Meda
- Centre de Recherche Internationale en Santé, University of Ouagadougou, Burkina Faso
| | - Sinead Delany-Moretlwe
- Wits Reproductive Health and HIV Institute, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Philippe Mayaud
- London School of Hygiene & Tropical Medicine, London, United Kingdom
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Taghavi K, Moono M, Mwanahamuntu M, Basu P, Limacher A, Tembo T, Kapesa H, Hamusonde K, Asangbeh S, Sznitman R, Low N, Manasyan A, Bohlius J. Screening test accuracy to improve detection of precancerous lesions of the cervix in women living with HIV: a study protocol. BMJ Open 2020; 10:e037955. [PMID: 33371015 PMCID: PMC7751198 DOI: 10.1136/bmjopen-2020-037955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 11/07/2020] [Accepted: 11/17/2020] [Indexed: 12/24/2022] Open
Abstract
INTRODUCTION The simplest and cheapest method for cervical cancer screening is visual inspection after application of acetic acid (VIA). However, this method has limitations for correctly identifying precancerous cervical lesions (sensitivity) and women free from these lesions (specificity). We will assess alternative screening methods that could improve sensitivity and specificity in women living with humanimmunodeficiency virus (WLHIV) in Southern Africa. METHODS AND ANALYSIS We will conduct a paired, prospective, screening test accuracy study among consecutive, eligible women aged 18-65 years receiving treatment for HIV/AIDS at Kanyama Hospital, Lusaka, Zambia. We will assess a portable magnification device (Gynocular, Gynius Plus AB, Sweden) based on the Swede score assessment of the cervix, test for high-risk subtypes of human papillomavirus (HR-HPV, GeneXpert, Cepheid, USA) and VIA. All study participants will receive all three tests and the reference standard at baseline and at six-month follow-up. The reference standard is histological assessment of two to four biopsies of the transformation zone. The primary histological endpoint is cervical intraepithelial neoplasia grade two and above (CIN2+). Women who are VIA-positive or have histologically confirmed CIN2+ lesions will be treated as per national guidelines. We plan to enrol 450 women. Primary outcome measures for test accuracy include sensitivity and specificity of each stand-alone test. In the secondary analyses, we will evaluate the combination of tests. Pre-planned additional studies include use of cervigrams to test an automated visual assessment tool using image pattern recognition, cost-analysis and associations with trichomoniasis. ETHICS AND DISSEMINATION Ethical approval was obtained from the University of Zambia Biomedical Research Ethics Committee, Zambian National Health Regulatory Authority, Zambia Medicines Regulatory Authority, Swissethics and the International Agency for Research on Cancer Ethics Committee. Results of the study will be submitted for publication in a peer-reviewed journal. TRIAL REGISTRATION NUMBER NCT03931083; Pre-results.
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Affiliation(s)
- Katayoun Taghavi
- Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Misinzo Moono
- Centre for Infectious Disease Research in Zambia (CIDRZ), Lusaka, Zambia
| | - Mulindi Mwanahamuntu
- Obstetrics and Gynaecology, University Teaching Hospital, Lusaka, Zambia
- Women and Newborn health, Levy Mwanawasa Medical University Hospital, Lusaka, Zambia
| | - Partha Basu
- International Agency for Research on Cancer (IARC), World Health Organization, Lyon, France
| | | | - Taniya Tembo
- Centre for Infectious Disease Research in Zambia (CIDRZ), Lusaka, Zambia
| | - Herbert Kapesa
- Centre for Infectious Disease Research in Zambia (CIDRZ), Lusaka, Zambia
| | - Kalongo Hamusonde
- Centre for Infectious Disease Research in Zambia (CIDRZ), Lusaka, Zambia
| | - Serra Asangbeh
- Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Raphael Sznitman
- ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland
| | - Nicola Low
- Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
| | - Albert Manasyan
- Centre for Infectious Disease Research in Zambia (CIDRZ), Lusaka, Zambia
- University of Alabama at Birmingham (UAB), Birmingham, Alabama, USA
| | - Julia Bohlius
- Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
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9
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Asgary R, Staderini N, Mthethwa-Hleta S, Lopez Saavedra PA, Garcia Abrego L, Rusch B, Marie Luce T, Rusike Pasipamire L, Ndlangamandla M, Beideck E, Kerschberger B. Evaluating smartphone strategies for reliability, reproducibility, and quality of VIA for cervical cancer screening in the Shiselweni region of Eswatini: A cohort study. PLoS Med 2020; 17:e1003378. [PMID: 33211691 PMCID: PMC7676712 DOI: 10.1371/journal.pmed.1003378] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 10/08/2020] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Cervical cancer is among the most common preventable cancers with the highest morbidity and mortality. The World Health Organization (WHO) recommends visual inspection of the cervix with acetic acid (VIA) as cervical cancer screening strategy in resource-poor settings. However, there are barriers to the sustainability of VIA programs including declining providers' VIA competence without mentorship and quality assurances and challenges of integration into primary healthcare. This study seeks to evaluate the impact of smartphone-based strategies in improving reliability, reproducibility, and quality of VIA in humanitarian settings. METHODS AND FINDINGS We implemented smartphone-based VIA that included standard VIA training, adapted refresher, and 6-month mHealth mentorship, sequentially, in the rural Shiselweni region of Eswatini. A remote expert reviewer provided diagnostic and management feedback on patients' cervical images, which were reviewed weekly by nurses. Program's outcomes, VIA image agreement rates, and Kappa statistic were compared before, during, and after training. From September 1, 2016 to December 31, 2018, 4,247 patients underwent screening; 247 were reviewed weekly by a VIA diagnostic expert. Of the 247, 128 (49%) were HIV-positive; mean age was 30.80 years (standard deviation [SD]: 7.74 years). Initial VIA positivity of 16% (436/2,637) after standard training gradually increased to 25.1% (293/1,168), dropped to an average of 9.7% (143/1,469) with a lowest of 7% (20/284) after refresher in 2017 (p = 0.001), increased again to an average of 9.6% (240/2,488) with a highest of 17% (17/100) before the start of mentorship, and dropped to an average of 8.3% (134/1,610) in 2018 with an average of 6.3% (37/591) after the start of mentorship (p = 0.019). Overall, 88% were eligible for and 68% received cryotherapy the same day: 10 cases were clinically suspicious for cancer; however, only 5 of those cases were confirmed using punch biopsy. Agreement rates with the expert reviewer for positive and negative cases were 100% (95% confidence interval [CI]: 79.4% to 100%) and 95.7% (95% CI: 92.2% to 97.9%), respectively, with negative predictive value (NPV) (100%), positive predictive value (PPV) (63.5%), and area under the curve of receiver operating characteristics (AUC ROC) (0.978). Kappa statistic was 0.74 (95% CI; 0.58 to 0.89); 0.64 and 0.79 at 3 and 6 months, respectively. In logistic regression, HIV and age were associated with VIA positivity (adjusted Odds Ratio [aOR]: 3.53, 95% CI: 1.10 to 11.29; p = 0.033 and aOR: 1.06, 95% CI: 1.0004 to 1.13; p = 0.048, respectively). We were unable to incorporate a control arm due to logistical constraints in routine humanitarian settings. CONCLUSIONS Our findings suggest that smartphone mentorship provided experiential learning to improve nurses' competencies and VIA reliability and reproducibility, reduced false positive, and introduced peer-to-peer education and quality control services. Local collaboration; extending services to remote populations; decreasing unnecessary burden to screened women, providers, and tertiary centers; and capacity building through low-tech high-yield screening are promising strategies for scale-up of VIA programs.
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Affiliation(s)
- Ramin Asgary
- Medecins Sans Frontieres, Geneva, Switzerland
- George Washington University, Washington, District of Columbia, United States of America
- Weill Cornell Medical College, New York, New York, United States of America
- * E-mail:
| | | | | | | | | | | | | | | | | | - Elena Beideck
- Weill Cornell Medical College, New York, New York, United States of America
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10
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Goldstein A, Goldstein LS, Lipson R, Bedell S, Wang J, Stamper SA, Brenner G, Goldstein GR, O'Keefe KD, O'Keefe SC, O'Keefe M, O'Keefe T, Goldstein AR, Zhao A. Assessing the feasibility of a rapid, high-volume cervical cancer screening programme using HPV self-sampling and digital colposcopy in rural regions of Yunnan, China. BMJ Open 2020; 10:e035153. [PMID: 32234744 PMCID: PMC7170644 DOI: 10.1136/bmjopen-2019-035153] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
OBJECTIVE Implementation of a novel, rapid, high-volume, see-and-treat cervical cancer screening programme using self-swab human papillomavirus (HPV) testing and digital colposcopy in underserved regions of Yunnan China. DESIGN 480-980 women per day self-swabbed for high-risk HPV (hrHPV+). Four careHPV machines (Qiagen) were run simultaneously to test the specimens. All hrHPV+ patients were contacted the same day and digital colposcopy was performed with the enhanced visual assessment system (MobileODT). Digital images were obtained, and all suspected lesions were biopsied and then treated. SETTING Rural and underserved areas of the Yunnan province, Kunming municipality. PARTICIPANTS 3600 women, mean age 50.2 years, who had never been screened for cervical cancer. The women were of the Yi, Hui, Dai and Han ethnicities. INTERVENTIONS Cryotherapy was performed on all lesions suspicious for cervical intraepithelial neoplasia (CIN) 1 and loop electrosurgical excision procedure was performed on all lesions suspicious for ≥CIN2. Endocervical curettage was performed if the transformation zone was not fully visualised. RESULTS 216 women (6%) were hrHPV+. 168 underwent same-day colposcopy (23 CIN1, 17≥CIN2). Digital colposcopy was able to identify 15 of 16 (93.8%)≥CIN2 lesions. CONCLUSIONS This study illustrates a high-volume, rapid and practical strategy that can be used to screen and treat an ethnically diverse group of Chinese women. First, HPV self-sampling allows large numbers of women to be screened rapidly and relatively inexpensively. Only hrHPV+ women will then require further evaluation. Digital colposcopy is then performed on hrHPV+ women with a portable digital colposcope. The high-resolution images obtained can facilitate appropriate same-day treatment as they are able to accurately distinguish between CIN1 and ≥CIN2 lesions.
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Affiliation(s)
- Andrew Goldstein
- Obstetrics and Gynecology, The George Washington University School of Medicine and Health Sciences, Washington, DC, USA
- The Center for Vulvovaginal Disorders, Washington, DC, USA
| | | | - Roberta Lipson
- Beijing United Family Hospitals and Clinics, Beijing, China
| | - Sarah Bedell
- The Center for Vulvovaginal Disorders, Washington, DC, USA
| | - Jue Wang
- Beijing United Family Hospitals and Clinics, Beijing, China
| | - Sarah A Stamper
- Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, Maryland, USA
| | | | | | | | | | - McKenna O'Keefe
- Engineering, University of California Berkeley, Berkeley, California, USA
| | | | | | - Anna Zhao
- Beijing United Family Hospitals and Clinics, Beijing, China
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11
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Newman H, Hu J, Li X, He J, Bradford L, Shan S, Wu X, Zhu B, Yang W, Fu B, Zhu B, Gao G. Evaluation of portable colposcopy and human papillomavirus testing for screening of cervical cancer in rural China. Int J Gynecol Cancer 2020; 29:23-27. [PMID: 30640679 DOI: 10.1136/ijgc-2018-000006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 09/29/2018] [Accepted: 10/08/2018] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE To evaluate the use of a portable, rechargeable colposcope combined with human papillomavirus (HPV) testing, as compared with HPV testing alone, for screening of cervical cancer and pre-cancerous lesions. METHODS This was a cross-sectional study among 488 women in Baoshan County, Yunnan. The women underwent HPV testing followed by Gynocular portable colposcopy with visual inspection with acetic acid. Obvious lesions were biopsied. If portable colposcopy testing was negative but HPV testing was positive, the women underwent follow-up testing with thin-prep cytology and traditional colposcopy. Cervical biopsies were performed for any abnormalities. Histopathology was followed up with diagnosis and treatment. RESULTS Among 488 women screened with portable colposcopy, 24 women underwent biopsy based on positive colposcopy screening. Of these 24 women, three were HPV positive and 21 were HPV negative. Five women had cervical intra-epithelial neoplasia (CIN) I and one had advanced cervical cancer. Forty-six women tested positive for HPV. Three of these women had screened positive on preliminary colposcopy, with one positive for CIN III/squamous cell carcinoma and one woman with CIN I. Forty-three women underwent follow-up testing with thin-prep cytology. Two women had atypical squamous cells of undetermined significance and five had low-grade squamous intra-epithelial lesions and were biopsied; three women had CIN I, one had CIN II and one had CIN III. HPV testing and portable colposcopy was more sensitive but slightly less specific than portable colposcopy or HPV testing alone. CONCLUSION While HPV testing has high sensitivity and specificity for the detection of pre-cancerous and cancerous lesions and portable colposcopy has lower specificity, both methods of detection have low positive predictive value and high negative predictive value. In tandem, HPV testing and portable colposcopy had higher sensitivity for detection among women who underwent biopsies. In clinical practice, portable colposcopy was an effective, easy and affordable tool to transport to villages where cytology is not currently feasible.
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Affiliation(s)
- Haley Newman
- Department of Obstetrics and Gynecology, University of Massachusetts Medical School, Worcester, Massachusetts, USA.,Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Jilin Hu
- Kunming University of Science and Technology, Kunming, China
| | - Xiao Li
- Department of Obstetrics and Gynecology, National Health Commission's Key Laboratory for Healthy Births in Western China, First People's Hospital of Yunnan Province, Yunnan, China
| | - Jing He
- Kunming University of Science and Technology, Kunming, China.,Department of Obstetrics and Gynecology, National Health Commission's Key Laboratory for Healthy Births in Western China, First People's Hospital of Yunnan Province, Yunnan, China
| | - Leslie Bradford
- Maine Medical Partners Women's Health Division of Gynecologic Oncology, Portland, Maine, USA
| | - Songmei Shan
- Department of Obstetrics and Gynecology, National Health Commission's Key Laboratory for Healthy Births in Western China, First People's Hospital of Yunnan Province, Yunnan, China
| | - Xiaomei Wu
- Kunming University of Science and Technology, Kunming, China.,Department of Obstetrics and Gynecology, National Health Commission's Key Laboratory for Healthy Births in Western China, First People's Hospital of Yunnan Province, Yunnan, China
| | - Bin Zhu
- Maternal and Child Health and Family Planning Service Center of Longyang District, Yunnan, China
| | - Wenyang Yang
- Maternal and Child Health and Family Planning Service Center of Longyang District, Yunnan, China
| | - Bingqin Fu
- Maternal and Child Health and Family Planning Service Center of Longyang District, Yunnan, China
| | - Baosheng Zhu
- Kunming University of Science and Technology, Kunming, China .,Department of Obstetrics and Gynecology, National Health Commission's Key Laboratory for Healthy Births in Western China, First People's Hospital of Yunnan Province, Yunnan, China
| | - Guangping Gao
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, Massachusetts, USA
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12
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Katanga J, Kjaer SK, Manongi R, Wu CS, Iftner T, Waldstrom M, Pembe AB, Mwaiselage J, Rasch V. Performance of careHPV, hybrid capture 2 and visual inspection with acetic acid for detection of high-grade cervical lesion in Tanzania: A cross-sectional study. PLoS One 2019; 14:e0218559. [PMID: 31216333 PMCID: PMC6583973 DOI: 10.1371/journal.pone.0218559] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 06/04/2019] [Indexed: 01/02/2023] Open
Abstract
Objective To examine the test performance of careHPV, Hybrid Capture2 (HC2) and visual inspection with acetic acid (VIA) for detection of cytologically diagnosed high-grade cervical lesions or cancer (HSIL+). Design Cross-sectional study. Setting Ocean Road Cancer Institute (ORCI) and Kilimanjaro Christian Medical Center (KCMC), Tanzania. Population Women attending routine cervical cancer screening. Method We enrolled 4080 women (25–60 years) in the study. The women were interviewed on lifestyle habits, and tested for HIV. A cervical specimen for careHPV testing (performed at ORCI and KCMC), and a liquid-based cytology sample for HPV DNA detection using HC2 (performed at Tuebingen University Hospital, Germany) and for cytology assessment (performed at Vejle Hospital, Denmark) were obtained at a gynecological examination. Subsequently, VIA was performed. With cytology as gold standard, the sensitivity and specificity of careHPV, HC2, and VIA for detection of HSIL+ were calculated. Results Altogether, 23.6% had a positive careHPV test, 19.1% had positive HC2 test, and 6.3% had a positive VIA test. The sensitivity/specificity was 88.9%/78.9% for careHPV and 91.1%/83.7%, for HC2. VIA showed a low sensitivity of 31.1% but a high specificity (94.6%) for detection of HSIL+. The sensitivity of careHPV, HC2 and VIA was higher among younger women, and among HIV positive women. VIA triage of careHPV positive women improved specificity, but sensitivity dropped to 27%. Conclusion Our results confirm the low sensitivity of VIA for detection of HSIL+ and further document that careHPV test is promising as a primary screening method for cervical-cancer prevention in low-resource regions. A suitable triage test has to be identified.
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Affiliation(s)
- Johnson Katanga
- Ocean Road Cancer Institute, Dar es Salaam, Tanzania
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
- * E-mail:
| | - Susanne K. Kjaer
- Danish Cancer Society Research Center, Unit of Virus, Lifestyle and Genes, Copenhagen, Denmark
- Department of Gynecology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Rachel Manongi
- Institute of Public Health, Kilimanjaro Christian Medical University College, Kilimanjaro, Tanzania
| | - Chun Sen Wu
- Department of Gynaecology and Obstetrics, Odense University Hospital, Odense, Denmark
- University of Southern Denmark, Odense, Denmark
| | - Thomas Iftner
- Department of Virologi, Tuebingen University Hospital, Tuebingen, Germany
| | | | - Andrea B. Pembe
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | | | - Vibeke Rasch
- Department of Gynaecology and Obstetrics, Odense University Hospital, Odense, Denmark
- University of Southern Denmark, Odense, Denmark
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13
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Mapanga W, Girdler-Brown B, Feresu SA, Chipato T, Singh E. Prevention of cervical cancer in HIV-seropositive women from developing countries through cervical cancer screening: a systematic review. Syst Rev 2018; 7:198. [PMID: 30447695 PMCID: PMC6240280 DOI: 10.1186/s13643-018-0874-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 11/05/2018] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND There is scanty or inconclusive evidence on which cervical cancer screening tool is effective and suitable for human immunodeficiency virus (HIV)-seropositive women. The aim of this review was to assess, synthesise and document published evidence relating to the available cervical cancer screening modalities for HIV-seropositive women in developing countries. This paper did not review the issue of human papillomavirus (HPV) prophylactic vaccine on HIV-seropositive women. METHODS Five electronic databases were systematically searched from inception to January 2018 for relevant published original research examining cervical cancer prevention modalities for HPV infection, abnormal cytology and direct visualisation of the cervix amongst HIV-seropositive women in developing countries. Extra studies were identified through reference list and citation tracking. RESULTS Due to methodological and clinical heterogeneity, a narrative synthesis was presented. Of the 2559 articles, 149 underwent full-text screening and 25 were included in the review. Included studies were of moderate quality, and no exclusions were made based on quality or bias. There is no standard cervical cancer screening test or programme for HIV-seropositive women and countries screening according to available resources and expertise. The screening methods used for HIV-seropositive women are the same for HIV-negative women, with varying clinical performance and accuracy. The main cervical cancer screening methods described for HIV-seropositive women are HPV deoxyribonucleic acid/messenger RNA (DNA/mRNA) testing (n = 16, 64.0%), visual inspection with acetic acid (VIA) (n = 13, 52.0%) and Pap smear (n = 11, 44.0%). HPV testing has a better accuracy/efficiency than other methods with a sensitivity of 80.0-97.0% and specificity of 51.0-78.0%. Sequential screening using VIA or visual inspection with Lugol's iodine (VILI) and HPV testing has shown better clinical performance in screening HIV-seropositive women. CONCLUSION Although cervical cancer screening exists in almost all developing countries, what is missing is both opportunistic and systematic organised population-based screenings. Cervical cancer screening programmes need to be integrated into already existing HIV services to enable early detection and treatment. There is a need to offer opportunistic and coordinated screening programmes that are provider-initiated to promote early identification of cervical precancerous lesions. SYSTEMATIC REVIEW REGISTRATION PROSPERO CRD42018095702.
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Affiliation(s)
- Witness Mapanga
- School of Health Systems and Public Health, Epidemiology & Biostatistics, University of Pretoria, 5-10 H.W. Snyman Building, Pretoria, South Africa. .,, Harare, Zimbabwe.
| | - Brendan Girdler-Brown
- School of Health Systems and Public Health, Epidemiology & Biostatistics, University of Pretoria, 5-10 H.W. Snyman Building, Pretoria, South Africa
| | - Shingairai A Feresu
- Faculty of Health Sciences, University of Fort Hare, 45 Church Street, Gasson Building, 7th Floor, P.O. Box 1054, East London, 5201, South Africa
| | - Tsungai Chipato
- Department of Obstetrics and Gynaecology, College of Health Sciences, University of Zimbabwe, Avondale, Harare, Zimbabwe
| | - Elvira Singh
- School of Health Systems and Public Health, Epidemiology & Biostatistics, University of Pretoria, 5-10 H.W. Snyman Building, Pretoria, South Africa.,Cancer Epidemiology Research Group, National Cancer Registry, National Health Laboratory Service, Johannesburg, South Africa
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14
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Cervical Cancer Screening Beliefs and Prevalence of LSIL/HSIL Among a University-Based Population in Cameroon. J Low Genit Tract Dis 2018; 22:274-279. [DOI: 10.1097/lgt.0000000000000433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Noncommunicable diseases among HIV-infected persons in low-income and middle-income countries: a systematic review and meta-analysis. AIDS 2018; 32 Suppl 1:S5-S20. [PMID: 29952786 DOI: 10.1097/qad.0000000000001888] [Citation(s) in RCA: 151] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVE To appropriately identify and treat noncommunicable diseases (NCDs) among persons living with HIV (PLHIV) in low-and-middle-income countries (LMICs), it is imperative to understand the burden of NCDs among PLHIV in LMICs and the current management of the diseases. DESIGN Systematic review and meta-analysis. METHODS We examined peer-reviewed literature published between 1 January 2010 and 31 December 2016 to assess currently available evidence regarding HIV and four selected NCDs (cardiovascular disease, cervical cancer, depression, and diabetes) in LMICs with a focus on sub-Saharan Africa. The databases, PubMed/MEDLINE, Cochrane Review, and Scopus, were searched to identify relevant literature. For conditions with adequate data available, pooled estimates for prevalence were generated using random fixed effects models. RESULTS Six thousand one hundred and forty-three abstracts were reviewed, 377 had potentially relevant prevalence data and 141 were included in the summary; 57 were selected for quantitative analysis. Pooled estimates for NCD prevalence were hypertension 21.2% (95% CI 16.3-27.1), hypercholesterolemia 22.2% (95% CI 14.7-32.1), elevated low-density lipoprotein 23.2% (95% CI 15.2-33.6), hypertriglyceridemia 27.2% (95% CI 20.7-34.8), low high-density lipoprotein 52.3% (95% CI 35.6-62.8), obesity 7.8% (95% CI 4.3-13.9), and depression 24.4% (95% CI 12.5-42.1). Invasive cervical cancer and diabetes prevalence were 1.3-1.7 and 1.3-18%, respectively. Few NCD-HIV integrated programs with screening and management approaches that are contextually appropriate for resource-limited settings exist. CONCLUSION Improved data collection and surveillance of NCDs among PLHIV in LMICs are necessary to inform integrated HIV/NCD care models. Although efforts to integrate care exist, further research is needed to optimize the efficacy of these programs.
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16
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Pollak JJ, Houri-Yafin A, Salpeter SJ. Computer Vision Malaria Diagnostic Systems-Progress and Prospects. Front Public Health 2017; 5:219. [PMID: 28879175 PMCID: PMC5573428 DOI: 10.3389/fpubh.2017.00219] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 08/07/2017] [Indexed: 12/17/2022] Open
Abstract
Accurate malaria diagnosis is critical to prevent malaria fatalities, curb overuse of antimalarial drugs, and promote appropriate management of other causes of fever. While several diagnostic tests exist, the need for a rapid and highly accurate malaria assay remains. Microscopy and rapid diagnostic tests are the main diagnostic modalities available, yet they can demonstrate poor performance and accuracy. Automated microscopy platforms have the potential to significantly improve and standardize malaria diagnosis. Based on image recognition and machine learning algorithms, these systems maintain the benefits of light microscopy and provide improvements such as quicker scanning time, greater scanning area, and increased consistency brought by automation. While these applications have been in development for over a decade, recently several commercial platforms have emerged. In this review, we discuss the most advanced computer vision malaria diagnostic technologies and investigate several of their features which are central to field use. Additionally, we discuss the technological and policy barriers to implementing these technologies in low-resource settings world-wide.
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17
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Holme F, Kapambwe S, Nessa A, Basu P, Murillo R, Jeronimo J. Scaling up proven innovative cervical cancer screening strategies: Challenges and opportunities in implementation at the population level in low- and lower-middle-income countries. Int J Gynaecol Obstet 2017; 138 Suppl 1:63-68. [PMID: 28691331 DOI: 10.1002/ijgo.12185] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The problem of cervical cancer in low- and lower-middle-income countries (LLMICs) is both urgent and important, and calls for governments to move beyond pilot testing to population-based screening approaches as quickly as possible. Experiences from Zambia, Bangladesh, Guatemala, Honduras, and Nicaragua, where scale-up of evidence-based screening strategies is taking place, may help other countries plan for large-scale implementation. These countries selected screening modalities recommended by the WHO that are within budgetary constraints, improve access for women, and reduce health system bottlenecks. In addition, some common elements such as political will and government investment have facilitated action in these diverse settings. There are several challenges for continued scale-up in these countries, including maintaining trained personnel, overcoming limited follow-up and treatment capacity, and implementing quality assurance measures. Countries considering scale-up should assess their readiness and conduct careful planning, taking into consideration potential obstacles. International organizations can catalyze action by helping governments overcome initial barriers to scale-up.
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Affiliation(s)
| | - Sharon Kapambwe
- Ministry of Health of Zambia and Centre for Infectious Disease Research in Zambia, Lusaka, Zambia
| | - Ashrafun Nessa
- Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
| | - Partha Basu
- International Agency for Research on Cancer, Lyon, France
| | - Raul Murillo
- Centro Javeriano de Oncologia, Hospital Universitario San Ignacio, Bogota, Colombia
- Faculty of Medicine, Pontificia Universidad Javeriana, Bogota, Colombia
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18
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Clinical Performance Validation of 4 Point-of-Care Cervical Cancer Screening Tests in HIV-Infected Women in Zambia. J Low Genit Tract Dis 2017; 20:218-23. [PMID: 27030883 DOI: 10.1097/lgt.0000000000000206] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES We sought to determine the clinical performance of visual inspection with acetic acid (VIA), digital cervicography (DC), Xpert human papillomavirus (HPV), and OncoE6 for cervical cancer screening in an HIV-infected population. MATERIALS AND METHODS HIV-infected women 18 years or older were included in this cross-sectional validation study conducted in Lusaka, Zambia. The screening tests were compared against a histological gold standard. We calculated sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios, and odds ratios using cervical intraepithelial neoplasia grade 2 or worse (CIN 2+) and grade 3 or worse (CIN 3+) thresholds. RESULTS Between January and June 2015, a total of 200 women were enrolled. Fifteen percent were screen positive by VIA, 20% by DC, 47% by Xpert HPV, and 6% by OncoE6. Using a CIN 2+ threshold, the sensitivity and specificity of VIA were 48% (95% CI = 30%-67%) and 92% (95% CI = 86%-95%), respectively. Similarly, the sensitivity and specificity of DC were 59% (95% CI = 41%-76%) and 88% (95% CI = 82%-93%), respectively. The sensitivity and specificity of Xpert HPV were 88% (95% CI = 71%-97%) and 60% (95% CI = 52%-68%), respectively. Finally, the sensitivity and specificity of OncoE6 were 31% (95% CI = 16%-50%) and 99% (95% CI = 97%-100%), respectively. CONCLUSIONS VIA and DC displayed moderate sensitivity and high specificity. Xpert HPV performed equivalently to currently approved HPV DNA tests, with high sensitivity and moderate specificity. OncoE6 displayed excellent specificity but low sensitivity. These results confirm an important role for VIA, DC, and Xpert HPV in screen-and-treat cervical cancer prevention in low- and middle-income countries, such as Zambia.
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An Insight Into Cervical Cancer Screening and Treatment Capacity in Sub Saharan Africa. J Low Genit Tract Dis 2016; 20:31-7. [PMID: 26579842 DOI: 10.1097/lgt.0000000000000165] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Approximately 85% of cervical cancer cases and deaths occur in resource-constrained countries where best practices for prevention, particularly for women with HIV infection, still need to be developed. The aim of this study was to assess cervical cancer prevention capacity in select HIV clinics located in resource-constrained countries. MATERIALS AND METHODS A cross-sectional survey of sub-Saharan African sites of 4 National Institutes of Health-funded HIV/AIDS networks was conducted. Sites were surveyed on the availability of cervical cancer screening and treatment among women with HIV infection and without HIV infection. Descriptive statistics and χ or Fisher exact test were used as appropriate. RESULTS Fifty-one (65%) of 78 sites responded. Access to cervical cancer screening was reported by 49 sites (96%). Of these sites, 39 (80%) performed screening on-site. Central African sites were less likely to have screening on-site (p = .02) versus other areas. Visual inspection with acetic acid and Pap testing were the most commonly available on-site screening methods at 31 (79%) and 26 (67%) sites, respectively. High-risk HPV testing was available at 29% of sites with visual inspection with acetic acid and 50% of sites with Pap testing. Cryotherapy and radical hysterectomy were the most commonly available on-site treatment methods for premalignant and malignant lesions at 29 (74%) and 18 (46%) sites, respectively. CONCLUSIONS Despite limited resources, most sites surveyed had the capacity to perform cervical cancer screening and treatment. The existing infrastructure of HIV clinical and research sites may provide the ideal framework for scale-up of cervical cancer prevention in resource-constrained countries with a high burden of cervical dysplasia.
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Cervical Cancer Screening in Cameroon: Interobserver Agreement on the Interpretation of Digital Cervicography Results. J Low Genit Tract Dis 2016; 19:288-94. [PMID: 26164295 DOI: 10.1097/lgt.0000000000000133] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
OBJECTIVE The World Health Organization recommends visual inspection with acetic acid (VIA) for cervical cancer screening in resource-limited settings. In Cameroon, we use digital cervicography (DC) to capture images of the cervix after VIA. This study evaluated interobserver agreement of DC results, compared DC with histopathologic results, and examined interobserver agreement among screening methods. METHOD Three observers, blinded to each other's interpretations, evaluated 540 DC photographs as follows: (1) negative/positive for acetowhite lesions or cancer and (2) assigned a presumptive diagnosis of histopathologic lesion grade in the 91 cases that had a histopathologic diagnosis. Observer A was the actual screening nurse; B, a reproductive health nurse; C, a gynecologic oncologist; and D, the histopathologic diagnosis. We compared inter-rater agreement of DC impressions among observers A, B, and C, and with D, with Cohen kappas. RESULTS For interpretations of DC, (negative/positive) strengths of agreement of paired observers were the following: A/B, moderate [K, 0.54; 95% confidence interval (CI), 0.47-0.61], A/C, fair (K, 0.37; 95% CI, 0.29-0.44), and B/C, moderate (K, 0.45; 95% CI, 0.37-0.53). For presumptive pathologic grading, strengths of agreement for weighted Ks were as follows: A/B, moderate (K, 0.42; 95% CI, 0.28-0.56); A/C, fair (K, 0.33; 95% CI, 0.20-0.46); B/C, fair (K, 0.54; 95% CI, 0.40-0.67); A/D, moderate (K, 0.59; 95% CI, 0.45-0.74); B/D, moderate (K, 0.58; 95% CI, 0.46-0.70); and C/D, moderate (K, 0.50; 95% CI, 0.37-0.63). CONCLUSIONS Interobserver agreement of DC interpretations was mostly moderate among the 3 observers, between them and histopathology, and comparable to that of other visual-based screening methods, i.e., VIA, cytology, or colposcopy.
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Finocchario-Kessler S, Wexler C, Maloba M, Mabachi N, Ndikum-Moffor F, Bukusi E. Cervical cancer prevention and treatment research in Africa: a systematic review from a public health perspective. BMC Womens Health 2016; 16:29. [PMID: 27259656 PMCID: PMC4893293 DOI: 10.1186/s12905-016-0306-6] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Accepted: 05/21/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Women living in Africa experience the highest burden of cervical cancer. Research and investment to improve vaccination, screening, and treatment efforts are critically needed. We systematically reviewed and characterized recent research within a broader public health framework to organize and assess the range of cervical cancer research in Africa. METHODS We searched online databases and the Internet for published articles and cervical cancer reports in African countries. Inclusion criteria included publication between 2004 and 2014, cervical cancer-related content pertinent to one of the four public health categories (primary, secondary, tertiary prevention or quality of life), and conducted in or specifically relevant to countries or regions within the African continent. The study design, geographic region/country, focus of research, and key findings were documented for each eligible article and summarized to illustrate the weight and research coverage in each area. Publications with more than one focus (e.g. secondary and tertiary prevention) were categorized by the primary emphasis of the paper. Research specific to HIV-infected women or focused on feasibility issues was delineated within each of the four public health categories. RESULTS A total of 380 research articles/reports were included. The majority (54.6 %) of cervical cancer research in Africa focused on secondary prevention (i.e., screening). The number of publication focusing on primary prevention (23.4 %), particularly HPV vaccination, increased significantly in the past decade. Research regarding the treatment of precancerous lesions and invasive cervical cancer is emerging (17.6 %), but infrastructure and feasibility challenges in many countries have impeded efforts to provide and evaluate treatment. Studies assessing aspects of quality of life among women living with cervical cancer are severely limited (4.1 %). Across all categories, 11.3 % of publications focused on cervical cancer among HIV-infected women, while 17.1 % focused on aspects of feasibility for cervical cancer control efforts. CONCLUSIONS Cervical cancer research in African countries has increased steadily over the past decade, but more is needed. Tertiary prevention (i.e. treatment of disease with effective medicine) and quality of life of cervical cancer survivors are two severely under-researched areas. Similarly, there are several countries in Africa with little to no research ever conducted on cervical cancer.
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Affiliation(s)
| | - Catherine Wexler
- Department of Family Medicine, University of Kansas Medical Center, Kansas City, USA
| | - May Maloba
- Family AIDS Care and Education Services, Kenya Medical Research Institute, Kisumu, Kenya
| | - Natabhona Mabachi
- Department of Family Medicine, University of Kansas Medical Center, Kansas City, USA
| | - Florence Ndikum-Moffor
- Department of Preventive Medicine and Public Health, University of Kansas Medical Center, Kansas City, USA
| | - Elizabeth Bukusi
- Family AIDS Care and Education Services, Kenya Medical Research Institute, Kisumu, Kenya
- Center for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya
- Department of Obstetrics and Gynecology, University of Nairobi, Nairobi, Kenya
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Bateman AC, Katundu K, Mwanahamuntu MH, Kapambwe S, Sahasrabuddhe VV, Hicks ML, Chi BH, Stringer JSA, Parham GP, Chibwesha CJ. The burden of cervical pre-cancer and cancer in HIV positive women in Zambia: a modeling study. BMC Cancer 2015. [PMID: 26205980 PMCID: PMC4512016 DOI: 10.1186/s12885-015-1558-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Background HIV infection is associated with a higher incidence of precancerous cervical lesions and their progression to invasive cervical cancer (ICC). Zambia is a global epicenter of HIV and ICC, yet the overall burden of cervical pre-cancer [cervical intraepithelial neoplasia 3 (CIN3)] and ICC among its HIV positive adult female population is unknown. The objective of this study was to determine the burden of cervical disease among HIV positive women in Zambia by estimating the number with CIN3 and ICC. Methods We conducted a cross-sectional study among 309 HIV positive women attending screening in Lusaka (Zambia’s most populated province) to measure the cervical disease burden by visual inspection with acetic acid enhanced by digital cervicography (DC), cytology, and histology. We then used estimates of the prevalence of CIN3 and ICC from the cross-sectional study and Spectrum model-based estimates for HIV infection among Zambian women to estimate the burden of CIN3 and ICC among HIV positive women nationally. Results Over half (52 %) of the study participants screened positive by DC, while 45 % had cytologic evidence of high grade squamous intraepithelial lesions (SIL) or worse. Histopathologic evaluation revealed that 20 % of women had evidence of CIN2 or worse, 11 % had CIN3 or worse, and 2 % had ICC. Using the Spectrum model, we therefore estimate that 34,051 HIV positive women in Zambia have CIN3 and 7,297 have ICC. Conclusions The DC, cytology, and histology results revealed a large cervical disease burden in this previously unscreened HIV positive population. This very large burden indicates that continued scale-up of cervical cancer screening and treatment is urgently needed.
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Affiliation(s)
- Allen C Bateman
- Centre for Infectious Disease Research in Zambia, Lusaka, Zambia. .,University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Katundu Katundu
- Centre for Infectious Disease Research in Zambia, Lusaka, Zambia.
| | - Mulindi H Mwanahamuntu
- Centre for Infectious Disease Research in Zambia, Lusaka, Zambia. .,University of Zambia, Lusaka, Zambia.
| | - Sharon Kapambwe
- Centre for Infectious Disease Research in Zambia, Lusaka, Zambia.
| | | | | | - Benjamin H Chi
- Centre for Infectious Disease Research in Zambia, Lusaka, Zambia. .,University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | | | - Groesbeck P Parham
- Centre for Infectious Disease Research in Zambia, Lusaka, Zambia. .,University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. .,University of Zambia, Lusaka, Zambia.
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Bateman AC, Chibwesha CJ, Parham GP. Minimizing verification bias in cervical cancer screening of HIV-infected women. Int J Gynaecol Obstet 2014; 128:269-70. [PMID: 25467910 DOI: 10.1016/j.ijgo.2014.09.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 08/29/2014] [Accepted: 10/18/2014] [Indexed: 11/17/2022]
Affiliation(s)
- Allen C Bateman
- Centre for Infectious Disease Research in Zambia, Lusaka, Zambia; Department of Medicine, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Carla J Chibwesha
- Centre for Infectious Disease Research in Zambia, Lusaka, Zambia; Department of Obstetrics and Gynecology, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Groesbeck P Parham
- Centre for Infectious Disease Research in Zambia, Lusaka, Zambia; Department of Obstetrics and Gynecology, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; University Teaching Hospital, Lusaka, Zambia
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