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Sahasrabuddhe VV. Cervical Cancer: Precursors and Prevention. Hematol Oncol Clin North Am 2024:S0889-8588(24)00032-7. [PMID: 38760198 DOI: 10.1016/j.hoc.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2024]
Abstract
Cervical cancer, caused due to oncogenic types of human papillomavirus (HPV), is a leading preventable cause of cancer morbidity and mortality globally. Chronic, persistent HPV infection-induced cervical precursor lesions, if left undetected and untreated, can progress to invasive cancer. Cervical cancer screening approaches have evolved from cytology (Papanicolaou test) to highly sensitive HPV-based molecular methods and personalized, risk-stratified, management guidelines. Innovations like self-collection of samples to increase screening access, innovative triage methods to optimize management of screen positives, and scalable and efficacious precancer treatment approaches will be key to further enhance the utility of prevention interventions.
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Affiliation(s)
- Vikrant V Sahasrabuddhe
- Breast and Gynecologic Cancer Research Group, Division of Cancer Prevention, National Cancer Institute, National Institutes of Health, 9609 Medical Center Drive, Room 5E-338, Rockville, MD, USA.
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Luckett R, Ramogola-Masire D, Gompers A, Moraka N, Moyo S, Sedabadi L, Tawe L, Kashamba T, Gaborone K, Mathoma A, Noubary F, Kula M, Grover S, Dreyer G, Botha MH, Makhema J, Shapiro R, Hacker MR. Triage of HPV positivity in a high HIV prevalence setting: A prospective cohort study comparing visual triage methods and HPV genotype restriction in Botswana. Int J Gynaecol Obstet 2024; 165:507-518. [PMID: 37950533 PMCID: PMC11021160 DOI: 10.1002/ijgo.15225] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/08/2023] [Accepted: 10/12/2023] [Indexed: 11/12/2023]
Abstract
OBJECTIVE Guidelines for effective triage following positive primary high-risk human papillomavirus (HPV) screening in low- and middle-income countries with high human immunodeficiency virus (HIV)-prevalence have not previously been established. In the present study, we evaluated the performance of three triage methods for positive HPV results in women living with HIV (WLHIV) and without HIV in Botswana. METHODS We conducted baseline enrollment of a prospective cohort study from February 2021 to August 2022 in South-East District, Botswana. Non-pregnant women aged 25 or older with an intact cervix and no prior diagnosis of cervical cancer were systematically consented for enrollment, with enrichment of the cohort for WLHIV. Those who consented completed a questionnaire and then collected vaginal self-samples for HPV testing. Primary HPV testing for 15 individual genotypes was conducted using Atila AmpFire® HPV assay. Those with positive HPV results returned for a triage visit where all underwent visual inspection with acetic acid (VIA), colposcopy, and biopsy. Triage strategies with VIA, colposcopy and 8-type HPV genotype restriction (16/18/31/33/35/45/52/58), separately and in combination, were compared using histopathology as the gold standard in diagnosing cervical intraepithelial neoplasia (CIN) 2 or worse (CIN2+). RESULTS Among 2969 women enrolled, 1480 (50%) tested HPV positive. The cohort included 1478 (50%) WLHIV; 99% were virologically suppressed after a mean of 8 years on antiretroviral therapy. In total, 1269 (86%) women had histopathology data for analysis. Among WLHIV who tested positive for HPV, 131 (19%) of 688 had CIN2+ compared with 71 (12%) of 581 in women without HIV. Screening by 8-type HPV genotype restriction was more sensitive as triage to detect CIN2+ in WLHIV 87.79% (95% CI: 80.92-92.85) and women without HIV 85.92% (95% CI: 75.62-93.03) when compared with VIA (WLHIV 62.31% [95% CI: 53.39-70.65], women without HIV 44.29% [95% CI: 32.41-56.66]) and colposcopy (WLHIV 70.77% [95% CI: 62.15-78.41], women without HIV 45.71% [95% CI: 33.74-58.06]). However, 8-type HPV genotype restriction had low specificity in WLHIV of 30.88% (95% CI: 27.06-34.90) and women without HIV 37.06% (95% CI: 32.85-41.41). These results were similar when CIN3+ was used as the outcome. When combining 8-type HPV genotype restriction with VIA as the triage strategy, there was improved specificity to detect CIN2+ in WLHIV of 81.65% (95% CI: 78.18-84.79) but dramatically reduced sensitivity of 56.15% (95% CI: 47.18-64.84). CONCLUSIONS Eight-type HPV genotype restriction is a promising component of effective triage for HPV positivity. However, novel triage strategies in LMICs with high HIV prevalence may be needed to avoid the trade-off between sensitivity and specificity with currently available options. CLINICAL TRIALS REGISTRATION This study is registered on Clinicaltrials.gov no. NCT04242823, https://clinicaltrials.gov/ct2/show/NCT04242823.
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Affiliation(s)
- Rebecca Luckett
- Department of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Boston, USA
- Botswana Harvard Health Partnership, Gaborone, Botswana
- Department of Obstetrics and Gynecology, University of Botswana, Gaborone, Botswana
- Harvard Medical School, Boston, USA
| | - Doreen Ramogola-Masire
- Department of Obstetrics and Gynecology, University of Botswana, Gaborone, Botswana
- Department of Obstetrics & Gynaecology, University of Pretoria, Pretoria, South Africa
| | - Annika Gompers
- Department of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Boston, USA
| | | | - Sikhulile Moyo
- Botswana Harvard Health Partnership, Gaborone, Botswana
- Harvard T.H. Chan School of Public Health, Boston, USA
- School of Health Systems and Public Health, University of Pretoria, Pretoria, South Africa
- Department of Pathology, University of Botswana, Gaborone, Botswana
| | - Leatile Sedabadi
- Department of Obstetrics and Gynecology, University of Botswana, Gaborone, Botswana
| | - Leabaneng Tawe
- Department of Pathology, University of Botswana, Gaborone, Botswana
| | - Thanolo Kashamba
- Department of Pathology, University of Botswana, Gaborone, Botswana
| | | | - Anikie Mathoma
- Department of Obstetrics and Gynecology, University of Botswana, Gaborone, Botswana
| | - Farzad Noubary
- Department of Health Sciences, Northeastern University, Boston, USA
| | - Maduke Kula
- National Cervical Cancer Prevention Program, Ministry of Health and Wellness Botswana, Gaborone, Botswana
| | - Surbhi Grover
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, USA
| | - Greta Dreyer
- Department of Obstetrics & Gynaecology, University of Pretoria, Pretoria, South Africa
| | - Matthys H Botha
- Department of Obstetrics & Gynaecology, Stellenbosch University, Cape Town, South Africa
| | - Joseph Makhema
- Botswana Harvard Health Partnership, Gaborone, Botswana
- Harvard T.H. Chan School of Public Health, Boston, USA
| | - Roger Shapiro
- Botswana Harvard Health Partnership, Gaborone, Botswana
- Harvard Medical School, Boston, USA
- Harvard T.H. Chan School of Public Health, Boston, USA
- Department of Medicine, Beth Israel Deaconess Medical Center, Boston, USA
| | - Michele R Hacker
- Department of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Boston, USA
- Harvard Medical School, Boston, USA
- Harvard T.H. Chan School of Public Health, Boston, USA
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Luckett R, Ramogola-Masire D, Harris DA, Gompers A, Gaborone K, Mochoba L, Ntshese L, Mathoma A, Kula M, Shapiro R, Larson E. Feasibility and acceptability of an HPV self-testing strategy: lessons from a research context to assess for ability to implement into primary care at a national level in Botswana. Front Glob Womens Health 2024; 4:1300788. [PMID: 38259634 PMCID: PMC10800890 DOI: 10.3389/fgwh.2023.1300788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Accepted: 12/08/2023] [Indexed: 01/24/2024] Open
Abstract
Background The WHO strategy for cervical cancer elimination strives to achieve 70% coverage with high-performance cervical screening. While few low- and middle-income countries have achieved this, high-risk human papillomavirus (hrHPV) self-testing creates the possibility to rapidly upscale access to high-performance cervical screening across resource settings. However, effective hrHPV screening requires linkage to follow-up, which has been variable in prior studies. This study developed and tested an implementation strategy aimed at improving screening and linkage to follow-up care in South East District in Botswana. Methods This study performed primary hrHPV self-testing; those with positive results were referred for a triage visit. Withdrawals for any reason, loss-to follow-up between hrHPV test and triage visit, and number of call attempts to give hrHPV results were also documented. Acceptability of the program to patients was measured as the proportion of patients who completed a triage visit when indicated, meeting the a priori threshold of 80%. Feasibility was defined as the proportion of participants receiving the results and attending follow-up. To assess the associations between participant characteristics and loss-to-follow-up we used log-binomial regressions to estimate risk ratios and 95% confidence intervals (CI). Results Enrollment of 3,000 women occurred from February 2021 to August 2022. In total, 10 participants withdrew and an additional 33 were determined ineligible after consent, leaving a final cohort of 2,957 participants who underwent self-swab hrHPV testing. Half (50%) of participants tested positive for hrHPV and nearly all (98%) of participants received their hrHPV results, primarily via telephone. Few calls to participants were required to communicate results: 2,397 (82%) required one call, 386 (13%) required 2 calls, and only 151 (5%) required 3-5 calls. The median time from specimen collection to participant receiving results was 44 days (IQR, 27-65). Of all hrHPV positive participants, 1,328 (90%) attended a triage visit. Discussion In a large cohort we had low loss-to-follow-up of 10%, indicating that the strategy is acceptable. Telephonic results reporting was associated with high screening completion, required few calls to participants, and supports the feasibility of hrHPV self-testing in primary care followed by interval triage.
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Affiliation(s)
- Rebecca Luckett
- Department of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Boston, MA, United States
- Botswana Harvard Health Partnership, Gaborone, Botswana
- Department of Obstetrics and Gynecology, University of Botswana, Gaborone, Botswana
- Department of Obstetrics, Gynecology, and Reproductive Biology, Harvard Medical School, Boston, MA, United States
| | - Doreen Ramogola-Masire
- Department of Obstetrics and Gynecology, University of Botswana, Gaborone, Botswana
- Department of Obstetrics and Gynaecology, University of Pretoria, Pretoria, South Africa
| | - Devon A. Harris
- Department of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Boston, MA, United States
- Department of Obstetrics, Gynecology, and Reproductive Biology, Harvard Medical School, Boston, MA, United States
| | - Annika Gompers
- Department of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Boston, MA, United States
| | | | | | - Lapelo Ntshese
- Department of Obstetrics and Gynaecology, Bamalete Lutheran Hospital, Ramotswa, Botswana
| | - Anikie Mathoma
- Department of Obstetrics and Gynecology, University of Botswana, Gaborone, Botswana
| | - Maduke Kula
- National Cervical Cancer Prevention Program, Ministry of Health and Wellness Botswana, Gaborone, Botswana
| | - Roger Shapiro
- Botswana Harvard Health Partnership, Gaborone, Botswana
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, United States
| | - Elysia Larson
- Department of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Boston, MA, United States
- Department of Obstetrics, Gynecology, and Reproductive Biology, Harvard Medical School, Boston, MA, United States
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Mazurec K, Trzeszcz M, Mazurec M, Streb J, Halon A, Jach R. Triage Strategies for Non-16/Non-18 HPV-Positive Women in Primary HPV-Based Cervical Cancer Screening: p16/Ki67 Dual Stain vs. Cytology. Cancers (Basel) 2023; 15:5095. [PMID: 37894462 PMCID: PMC10605570 DOI: 10.3390/cancers15205095] [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: 09/18/2023] [Revised: 10/13/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND In the context of primary HPV cervical cancer screening, the identification of minor screening abnormalities necessitates triage tests to optimize management and mitigate overtreatment. Currently, reflex cytology and reflex p16/Ki67 dual-stain (DS) are under scrutiny for their applicability in primary HPV-based screening. However, there remains a dearth of comprehensive data for comparing their performance. METHODS Among 30,066 results from liquid-based cervical cancer screening tests, a cohort of 332 cases was meticulously selected based on available high-risk human papillomavirus (HPV) test results, limited genotyping for HPV 16 and 18, liquid-based cytology, DS, and histology outcomes from standardized colposcopy with biopsy. For cases positive for 12 other high-risk HPV genotypes, three retrospective triage approaches were analyzed. We computed the positive predictive value (PPV) for the detection of high-grade squamous intraepithelial lesions or worse (HSIL+). RESULTS Both triage models employing DS (reflex cytology followed by DS and reflex DS alone in all cases) exhibited significantly higher PPV for HSIL+ compared to the strategy with reflex cytology alone (35.9%/33.3% vs. 18.8%; p < 0.0001). Additionally, these DS-based models showed higher negative predictive values (NPV) (100%/96.2% vs. 69.2%; p = 0.0024/0.0079). In the DS-inclusive models, fewer colposcopies were necessitated (103/102 vs. 154), and fewer cases of HSIL+ were overlooked (0/3 vs. 8). CONCLUSIONS Our findings suggest that p16/Ki67 dual-stain, either as a standalone or combined triage test, holds promise for the effective detection of HSIL+ in patients with minor screening abnormalities in primary HPV-based cervical cancer screening.
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Affiliation(s)
- Karolina Mazurec
- Corfamed Woman’s Health Center, Kluczborska 37, 50-322 Wroclaw, Poland;
| | - Martyna Trzeszcz
- Corfamed Woman’s Health Center, Kluczborska 37, 50-322 Wroclaw, Poland;
- Division of Pathology and Clinical Cytology, University Hospital in Wroclaw, Borowska 213, 50-556 Wroclaw, Poland
| | - Maciej Mazurec
- Corfamed Woman’s Health Center, Kluczborska 37, 50-322 Wroclaw, Poland;
| | - Joanna Streb
- Department of Oncology, Jagiellonian University Medical College, Kopernika 50, 31-501 Krakow, Poland;
| | - Agnieszka Halon
- Department of Clinical and Experimental Pathology, Division of Clinical Pathology, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland;
| | - Robert Jach
- Division of Gynecologic Endocrinology, Jagiellonian University Medical College, Kopernika 23, 31-501 Krakow, Poland;
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Batman S, Rangeiro R, Monteiro E, Changule D, Daud S, Ribeiro M, Tsambe E, Bila C, Osman N, Carrilho C, Neves A, Atif H, De Jesus C, Mariano A, Moretti-Marques R, Vieira M, Fontes-Cintra G, Lopes A, Batware JC, Luis E, Grover S, Baker E, Fellman B, Montealegre J, Castle PE, Jeronimo J, Chiao E, Lorenzoni C, Schmeler K, Salcedo MP. Expanding Cervical Cancer Screening in Mozambique: Challenges Associated With Diagnosing and Treating Cervical Cancer. JCO Glob Oncol 2023; 9:e2300139. [PMID: 37824802 PMCID: PMC10664858 DOI: 10.1200/go.23.00139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/26/2023] [Accepted: 08/28/2023] [Indexed: 10/14/2023] Open
Abstract
PURPOSE Mozambique has one of the highest burdens of cervical cancer globally. Treatment options are few as most women present with advanced disease, and there are limited trained health professionals and health care resources. The objective of this study was to describe the outcomes of women diagnosed with invasive cancer as part of the Mozambican women undergoing cervical cancer screening with human papillomavirus (HPV) testing in conjunction with family planning services (MULHER) study. MATERIALS AND METHODS Women age 30-49 years were prospectively enrolled in the MULHER study and offered screening with primary HPV testing followed by treatment of screen-positive women with thermal ablation or excision as appropriate. Women with cervical examination findings suspicious for cancer were referred to one of the three gynecologic oncologists in the country. RESULTS Between January 2020 and January 2023, 9,014 women underwent cervical cancer screening and 30 women were diagnosed with cervical cancer. In this cohort, four patients (13.3%) had early-stage disease, 18 (60.0%) had locally advanced disease, one (3.3%) had distant metastatic disease, and seven (23.3%) did not have staging information available. Five patients (16.6%) died without receiving oncologic treatment, and seven patients (23.3%) are still awaiting treatment. Of the remaining 18 patients, three (17.6%) underwent surgery and four (23.5%) received radiotherapy. Eleven (36.7%) patients received only chemotherapy. CONCLUSION As cervical screening programs are implemented in low-resource settings, there will likely be an increase in the number of women diagnosed with invasive cervical cancer. Our results in Mozambique demonstrate the need to increase access to advanced surgery, radiation, and palliative care services.
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Affiliation(s)
- Samantha Batman
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | | | - Siro Daud
- Maputo Central Hospital, Maputo, Mozambique
| | | | | | - Celso Bila
- Maputo Central Hospital, Maputo, Mozambique
| | | | | | - Andrea Neves
- Jose Macamo General Hospital, Maputo, Mozambique
| | - Hira Atif
- Maputo Central Hospital, Maputo, Mozambique
| | | | | | | | | | | | - Andre Lopes
- Instituto do Cancer do Estado de São Paulo, São Paulo, Brazil
| | | | | | | | - Ellen Baker
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Bryan Fellman
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | | | - Elizabeth Chiao
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | - Mila P. Salcedo
- The University of Texas MD Anderson Cancer Center, Houston, TX
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Salek M, Silverstein A, Tilly A, Gassant PY, Gunasekera S, Hordofa DF, Hesson D, Duffy C, Malik N, McNeil M, Force LM, Bhakta N, Rodin D, Kaye EC. Factors influencing treatment decision-making for cancer patients in low- and middle-income countries: A scoping review. Cancer Med 2023; 12:18133-18152. [PMID: 37526041 PMCID: PMC10524036 DOI: 10.1002/cam4.6375] [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: 03/23/2023] [Revised: 07/01/2023] [Accepted: 07/16/2023] [Indexed: 08/02/2023] Open
Abstract
PURPOSE In this scoping review, we evaluated existing literature related to factors influencing treatment decision-making for patients diagnosed with cancer in low- and middle-income countries, noting factors that influence decisions to pursue treatment with curative versus non-curative intent. We identified an existing framework for adult cancer developed in a high-income country (HIC) context and described similar and novel factors relevant to low-and middle-income country settings. METHODS We used scoping review methodology to identify and synthesize existing literature on factors influencing decision-making for pediatric and adult cancer in these settings. Articles were identified through an advanced Boolean search across six databases, inclusive of all article types from inception through July 2022. RESULTS Seventy-nine articles were identified from 22 countries across six regions, primarily reporting the experiences of lower-middle and upper-middle-income countries. Included articles largely represented original research (54%), adult cancer populations (61%), and studied patients as the targeted population (51%). More than a quarter of articles focused exclusively on breast cancer (28%). Approximately 30% described factors that influenced decisions to choose between therapies with curative versus non-curative intent. Of 56 reported factors, 22 novel factors were identified. Socioeconomic status, reimbursement policies/cost of treatment, and treatment and supportive care were the most commonly described factors. CONCLUSIONS This scoping review expanded upon previously described factors that influence cancer treatment decision-making in HICs, broadening knowledge to include perspectives of low- and middle-income countries. While global commonalities exist, certain variables influence treatment choices differently or uniquely in different settings. Treatment regimens should further be tailored to local environments with consideration of contextual factors and accessible resources that often impact decision-making.
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Affiliation(s)
- Marta Salek
- Department of Global Pediatric MedicineSt Jude Children's Research HospitalMemphisTennesseeUSA
| | - Allison Silverstein
- Department of PediatricsUniversity of Colorado School of MedicineAuroraColoradoUSA
| | - Alyssa Tilly
- Division of General Medicine and Clinical EpidemiologyUniversity of North Carolina School of MedicineChapel HillNorth CarolinaUSA
| | | | - Sanjeeva Gunasekera
- Department of Paediatric OncologyNational Cancer InstituteMaharagamaSri Lanka
| | - Diriba Fufa Hordofa
- Department of Pediatrics and Child HealthJimma University Medical CenterJimmaEthiopia
| | - Donna Hesson
- Welch Medical LibraryJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Caitlyn Duffy
- Department of Global Pediatric MedicineSt Jude Children's Research HospitalMemphisTennesseeUSA
| | - Nauman Malik
- Department of Radiation OncologyUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
| | - Michael McNeil
- Department of Global Pediatric MedicineSt Jude Children's Research HospitalMemphisTennesseeUSA
| | - Lisa M. Force
- Department of Health Metrics Sciences and Department of Pediatrics, Division of Pediatric Hematology/OncologyUniversity of WashingtonSeattleWashingtonUSA
| | - Nickhill Bhakta
- Department of Global Pediatric MedicineSt Jude Children's Research HospitalMemphisTennesseeUSA
| | - Danielle Rodin
- Department of Radiation, OncologyUniversity of TorontoTorontoOntarioCanada
- Radiation Medicine ProgramPrincess Margaret Cancer CentreTorontoOntarioCanada
- Canada Global Cancer ProgramPrincess Margaret Cancer CentreTorontoOntarioCanada
| | - Erica C. Kaye
- Department of OncologySt Jude Children's Research HospitalMemphisTennesseeUSA
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Rayner M, Welp A, Stoler MH, Cantrell LA. Cervical Cancer Screening Recommendations: Now and for the Future. Healthcare (Basel) 2023; 11:2273. [PMID: 37628471 PMCID: PMC10454304 DOI: 10.3390/healthcare11162273] [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: 05/31/2023] [Revised: 07/08/2023] [Accepted: 08/01/2023] [Indexed: 08/27/2023] Open
Abstract
Cervical cancer is the fourth most common cancer worldwide, with over 600,000 new cases annually and approximately 350,000 cancer-related deaths per year. The disease burden is disproportionately distributed, with cancer-related mortality ranging from 5.2 deaths per 100,000 individuals in highly-developed countries, to 12.4 deaths per 100,000 in less-developed countries. This article is a review of the current screening recommendations and potential future recommendations.
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Affiliation(s)
| | | | | | - Leigh A. Cantrell
- Department of Obstetrics and Gynecology, University of Virginia, Charlottesville, VA 22908, USA
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Diakite M, Shaw-Saliba K, Lau CY. Malignancy and viral infections in Sub-Saharan Africa: A review. FRONTIERS IN VIROLOGY (LAUSANNE, SWITZERLAND) 2023; 3:1103737. [PMID: 37476029 PMCID: PMC10358275 DOI: 10.3389/fviro.2023.1103737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
The burden of malignancy related to viral infection is increasing in Sub-Saharan Africa (SSA). In 2018, approximately 2 million new cancer cases worldwide were attributable to infection. Prevention or treatment of these infections could reduce cancer cases by 23% in less developed regions and about 7% in developed regions. Contemporaneous increases in longevity and changes in lifestyle have contributed to the cancer burden in SSA. African hospitals are reporting more cases of cancer related to infection (e.g., cervical cancer in women and stomach and liver cancer in men). SSA populations also have elevated underlying prevalence of viral infections compared to other regions. Of 10 infectious agents identified as carcinogenic by the International Agency for Research on Cancer, six are viruses: hepatitis B and C viruses (HBV and HCV, respectively), Epstein-Barr virus (EBV), high-risk types of human papillomavirus (HPV), Human T-cell lymphotropic virus type 1 (HTLV-1), and Kaposi's sarcoma herpesvirus (KSHV, also known as human herpesvirus type 8, HHV-8). Human immunodeficiency virus type 1 (HIV) also facilitates oncogenesis. EBV is associated with lymphomas and nasopharyngeal carcinoma; HBV and HCV are associated with hepatocellular carcinoma; KSHV causes Kaposi's sarcoma; HTLV-1 causes T-cell leukemia and lymphoma; HPV causes carcinoma of the oropharynx and anogenital squamous cell cancer. HIV-1, for which SSA has the greatest global burden, has been linked to increasing risk of malignancy through immunologic dysregulation and clonal hematopoiesis. Public health approaches to prevent infection, such as vaccination, safer injection techniques, screening of blood products, antimicrobial treatments and safer sexual practices could reduce the burden of cancer in Africa. In SSA, inequalities in access to cancer screening and treatment are exacerbated by the perception of cancer as taboo. National level cancer registries, new screening strategies for detection of viral infection and public health messaging should be prioritized in SSA's battle against malignancy. In this review, we discuss the impact of carcinogenic viruses in SSA with a focus on regional epidemiology.
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Affiliation(s)
- Mahamadou Diakite
- University Clinical Research Center, University of Sciences, Techniques, and Technologies, Bamako, Mali
| | - Kathryn Shaw-Saliba
- Collaborative Clinical Research Branch, Division of Clinical Research, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Chuen-Yen Lau
- HIV Dynamics and Replication Program, National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, MD, United States
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