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Wight AJ. Latin America is catching up on HPV vaccination and screening. BMJ 2024; 386:q1553. [PMID: 39043391 DOI: 10.1136/bmj.q1553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
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2
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Guzha BT, Matubu A, Nyandoro G, Mubata HO, Moyo E, Murewanhema G, Chirenje ZM. The impact of DNA tumor viruses in low-to-middle income countries (LMICS): A literature review. Tumour Virus Res 2024; 18:200289. [PMID: 38977263 PMCID: PMC11298656 DOI: 10.1016/j.tvr.2024.200289] [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: 02/15/2024] [Revised: 07/02/2024] [Accepted: 07/03/2024] [Indexed: 07/10/2024] Open
Abstract
DNA viruses are common in the human population and act as aetiological agents of cancer on a large scale globally. They include the human papillomaviruses (HPV), Epstein-Barr virus (EBV), Kaposi sarcoma-associated herpesvirus (KSHV), hepatitis viruses, and human polyomaviruses. Oncogenic viruses employ different mechanisms to induce cancer. Notably, cancer only develops in a minority of individuals who are infected, usually following protracted years of chronic infection. The human papillomaviruses (HPVs) are associated with the highest number of cancer cases, including cervical cancer and other epithelial malignancies. Hepatitis B virus (HBV) and the RNA virus hepatitis C (HCV) are significant contributors to hepatocellular cancer (HCC). Other oncoviruses include Epstein-Barr virus (EBV), Kaposi sarcoma-associated herpes virus (KSHV), human T-cell leukemia virus (HTLV-I), and Merkel cell polyomavirus (MCPyV). The identification of these infectious agents as aetiological agents for cancer has led to reductions in cancer incidence through preventive interventions such as HBV and HPV vaccination, HPV-DNA based cervical cancer screening, antiviral treatments for chronic HBV and HCV infections, and screening of blood for transfusion for HBV and HCV. Successful efforts to identify additional oncogenic viruses in human cancer may provide further understanding of the aetiology and development of cancer, and novel approaches for prevention and treatment. Cervical cancer, caused by HPV, is the leading gynaecological malignancy in LMICs, with high age-standardised incidence and mortality rates, HCC due to HBV is an important cause of cancer deaths, and the burden of other cancer attributable to infections continues to rise globally. Hence, cancers attributable to DNA viruses have become a significant global health challenge. These viruses hence warrant continued attention and interrogation as efforts to understand them further and device further preventive interventions are critical.
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Affiliation(s)
- Bothwell Takaingofa Guzha
- Department of Obstetrics and Gynaecology, Faculty of Medicine and Health Sciences, University of Zimbabwe, Harare, Zimbabwe; University of Zimbabwe Clinical Trials Research Centre, Harare, Zimbabwe
| | - Allen Matubu
- University of Zimbabwe Clinical Trials Research Centre, Harare, Zimbabwe
| | - George Nyandoro
- Hepatitis Alliance, 2172, Arlington, Hatfield, Harare, Zimbabwe
| | - Hamish O Mubata
- Department of Obstetrics and Gynaecology, Faculty of Medicine and Health Sciences, University of Zimbabwe, Harare, Zimbabwe
| | - Enos Moyo
- School of Public Health Medicine, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Grant Murewanhema
- Department of Obstetrics and Gynaecology, Faculty of Medicine and Health Sciences, University of Zimbabwe, Harare, Zimbabwe; University of Zimbabwe Clinical Trials Research Centre, Harare, Zimbabwe.
| | - Zvavahera M Chirenje
- University of Zimbabwe Clinical Trials Research Centre, Harare, Zimbabwe; Department of Obstetrics, Gynecology and Reproductive Science, University of California San Francisco, San Francisco, USA
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3
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Quang TT, Yang J, Kaluzienski ML, Parrish A, Farooqui A, Katz D, Crouch B, Ramanujam N, Mueller JL. In Vivo Evaluation of Safety and Efficacy of Ethyl Cellulose-Ethanol Tissue Ablation in a Swine Cervix Model. Bioengineering (Basel) 2023; 10:1246. [PMID: 38002370 PMCID: PMC10669649 DOI: 10.3390/bioengineering10111246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/10/2023] [Accepted: 10/19/2023] [Indexed: 11/26/2023] Open
Abstract
Current therapies for treating cervical dysplasia are often inaccessible in low and middle-income countries (LMICs), highlighting the need for novel low-cost therapies that can be delivered at the point of care. Ethanol ablation is a low-cost therapy designed to treat locoregional cancers, which we augmented into an ethyl cellulose (EC)-ethanol gel formulation to enhance its efficacy. Here, we evaluated whether EC-ethanol ablation is able to safely achieve an ablation zone comparable to thermocoagulation, a commonly used therapy for cervical dysplasia. The study was performed in 20 female Yorkshire pigs treated with either a single 500 µL injection of EC-ethanol into the 12 o'clock position of the cervix or a single application of thermocoagulation at 100 °C for 20 s. The average temperature, heart rate, respiratory rate, and blood oxygen remained within normal ranges throughout the EC-ethanol procedure and were similar to the thermocoagulation group. No major side effects were observed. The reproductive tracts were excised after 24 h to examine ablation zones. Comparable depths of necrosis were seen for EC-ethanol (18.6 ± 1.6 mm) and thermocoagulation (19.7 ± 4.1 mm). The volumes of necrosis induced by a single injection of EC-ethanol (626.2 ± 122.8 µL) were comparable to the necrotic volumes induced by thermocoagulation in the top half of the cervices (664.6 ± 168.5 µL). This suggests that two EC-ethanol injections could be performed (e.g., at the 12 and 6 o'clock positions) to achieve comparable total necrotic volumes to thermocoagulation and safely and effectively treat women with cervical dysplasia in LMICs. This is the first study to systematically evaluate EC-ethanol ablation in a large animal model and compare its safety and efficacy to thermocoagulation, a commonly used ablative therapy for cervical dysplasia.
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Affiliation(s)
- Tri T. Quang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA; (T.T.Q.); (J.Y.); (M.L.K.); (A.P.); (A.F.)
| | - Jeffrey Yang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA; (T.T.Q.); (J.Y.); (M.L.K.); (A.P.); (A.F.)
- Center for Interventional Oncology, Radiology and Imaging Sciences, NIH Clinical Center, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Michele L. Kaluzienski
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA; (T.T.Q.); (J.Y.); (M.L.K.); (A.P.); (A.F.)
| | - Anna Parrish
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA; (T.T.Q.); (J.Y.); (M.L.K.); (A.P.); (A.F.)
| | - Asma Farooqui
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA; (T.T.Q.); (J.Y.); (M.L.K.); (A.P.); (A.F.)
| | - David Katz
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA; (D.K.); (B.C.); (N.R.)
- Department of Obstetrics and Gynecology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Brian Crouch
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA; (D.K.); (B.C.); (N.R.)
| | - Nimmi Ramanujam
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA; (D.K.); (B.C.); (N.R.)
- Duke Global Health Institute, Duke University, Durham, NC 27710, USA
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27708, USA
| | - Jenna L. Mueller
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA; (T.T.Q.); (J.Y.); (M.L.K.); (A.P.); (A.F.)
- Department of OB-GYN & Reproductive Science, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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4
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Maina D, Chung MH, Temmerman M, Moloo Z, Wawire J, Greene SA, Unger ER, Mugo N, Sakr S, Sayed S, McGrath CJ. P16 expression and recurrent cervical intraepithelial neoplasia after cryotherapy among women living with HIV. Front Med (Lausanne) 2023; 10:1277480. [PMID: 37881629 PMCID: PMC10597651 DOI: 10.3389/fmed.2023.1277480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 09/27/2023] [Indexed: 10/27/2023] Open
Abstract
Background The expression of p16 protein, a surrogate marker for high-risk human papillomavirus (hrHPV), is associated with cervical dysplasia. We evaluated correlates of p16 expression at treatment for high-grade cervical lesions and its utility in predicting the recurrence of cervical intraepithelial lesions grade 2 or higher (CIN2+) following cryotherapy among women with HIV. Methods This is a subgroup analysis of women with HIV in Kenya with baseline cervical biopsy-confirmed CIN2+ who were randomized to receive cryotherapy and followed every six-months for two-years for biopsy-confirmed recurrence of CIN2+. P16 immunohistochemistry was performed on the baseline cervical biopsy with a positive result defined as strong abnormal nuclear expression in a continuous block segment of cells (at least 10-20 cells). Results Among the 200 women with CIN2+ randomized to cryotherapy, 160 (80%) had a baseline cervical biopsy specimen available, of whom 94 (59%) were p16-positive. p16 expression at baseline was associated with presence of any one of 14 hrHPV genotypes [Odds Ratio (OR) = 3.2; 95% Confidence Interval (CI), 1.03-9.78], multiple lifetime sexual partners (OR = 1.6; 95% CI, 1.03-2.54) and detectable plasma HIV viral load (>1,000 copies/mL; OR = 1.43; 95% CI, 1.01-2.03). Longer antiretroviral therapy duration (≥2 years) at baseline had lower odds of p16 expression (OR = 0.46; 95% CI, 0.24-0.87) than <2 years of antiretroviral therapy. Fifty-one women had CIN2+ recurrence over 2-years, of whom 33 (65%) were p16-positive at baseline. p16 was not associated with CIN2+ recurrence (Hazard Ratio = 1.35; 95% CI, 0.76-2.40). Conclusion In this population of women with HIV and CIN2+, 41% of lesions were p16 negative and baseline p16 expression did not predict recurrence of cervical neoplasia during two-year follow up.
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Affiliation(s)
- Daniel Maina
- Department of Pathology and Laboratory Medicine, Aga Khan University Hospital, Nairobi, Kenya
| | - Michael H. Chung
- Division of Infectious Diseases, Department of Medicine Emory University, Atlanta, GA, United States
| | - Marleen Temmerman
- Department of Pathology and Laboratory Medicine, Aga Khan University Hospital, Nairobi, Kenya
| | - Zahir Moloo
- Department of Pathology and Laboratory Medicine, Aga Khan University Hospital, Nairobi, Kenya
| | - Jonathan Wawire
- Department of Pathology and Laboratory Medicine, Aga Khan University Hospital, Nairobi, Kenya
| | - Sharon A. Greene
- Department of Global Health, University of Washington, Seattle, WA, United States
| | | | - Nelly Mugo
- Sexual Reproductive and Adolescent Child Health Research Program, Kenya Medical Research Institute, Nairobi, Kenya
| | | | - Shahin Sayed
- Department of Pathology and Laboratory Medicine, Aga Khan University Hospital, Nairobi, Kenya
| | - Christine J. McGrath
- Department of Global Health, University of Washington, Seattle, WA, United States
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Boisen M, Guido R. Emerging Treatment Options for Cervical Dysplasia and Early Cervical Cancer. Clin Obstet Gynecol 2023; 66:500-515. [PMID: 37650664 DOI: 10.1097/grf.0000000000000790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
DISCUSSION of treatment strategies for cervical cancer precursors, review of medical therapies and emerging therapeutics for treatment of cervical cancers, and updates on new approaches to treating early-stage cervical cancers.
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Affiliation(s)
- Michelle Boisen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital of UPMC, Pittsburgh, Pennsylvania
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Quang TT, Yang J, Mikhail AS, Wood BJ, Ramanujam N, Mueller JL. Locoregional Thermal and Chemical Tumor Ablation: Review of Clinical Applications and Potential Opportunities for Use in Low- and Middle-Income Countries. JCO Glob Oncol 2023; 9:e2300155. [PMID: 37625104 PMCID: PMC10581629 DOI: 10.1200/go.23.00155] [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: 05/11/2023] [Revised: 05/31/2023] [Accepted: 07/01/2023] [Indexed: 08/27/2023] Open
Abstract
This review highlights opportunities to develop accessible ablative therapies to reduce the cancer burden in LMICs.
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Affiliation(s)
- Tri T. Quang
- Department of Bioengineering, University of Maryland, College Park, MD
| | - Jeffrey Yang
- Department of Bioengineering, University of Maryland, College Park, MD
- Center for Interventional Oncology, Radiology and Imaging Sciences, NIH Clinical Center, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Andrew S. Mikhail
- Center for Interventional Oncology, Radiology and Imaging Sciences, NIH Clinical Center, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Bradford J. Wood
- Center for Interventional Oncology, Radiology and Imaging Sciences, NIH Clinical Center, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Nimmi Ramanujam
- Department of Biomedical Engineering, Duke University, Durham, NC
- Duke Global Health Institute, Duke University, Durham, NC
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC
| | - Jenna L. Mueller
- Department of Bioengineering, University of Maryland, College Park, MD
- Department of OB-GYN and Reproductive Science, University of Maryland School of Medicine, Baltimore, MD
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD
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Morse RM, Jurczuk M, Brown J, Jara LEC, Meza G, López EJR, Tracy JK, Gravitt PE, Paz-Soldan VA. "Day or night, no matter what, I will go": Women's perspectives on challenges with follow-up care after cervical cancer screening in Iquitos, Peru: a qualitative study. BMC Womens Health 2023; 23:293. [PMID: 37259075 DOI: 10.1186/s12905-023-02414-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 05/05/2023] [Indexed: 06/02/2023] Open
Abstract
BACKGROUND The study's objective was to explore the factors associated with loss to follow-up among women with abnormal cervical cancer screening results in Iquitos, Peru from women's perspectives. METHODS In-depth interviews were conducted with 20 screen-positive women who were referred for follow-up care but for whom evidence of follow-up was not found. Interview transcripts were thematically analyzed inductively, and the codes were then categorized using the Health Care Access Barriers Model for presentation of results. RESULTS All interviewed women were highly motivated to complete the continuum of care but faced numerous barriers along the way, including cognitive barriers such as a lack of knowledge about cervical cancer and poor communication from health professionals regarding the process, structural barriers such as challenges with scheduling appointments and unavailability of providers, and financial barriers including out-of-pocket payments and costs related to travel or missing days of work. With no information system tracking the continuum of care, we found fragmentation between primary and hospital-level care, and often, registration of women's follow-up care was missing altogether, preventing women from being able to receive proper care and providers from ensuring that women receive care and treatment as needed. CONCLUSIONS The challenges elucidated demonstrate the complexity of implementing a successful cervical cancer prevention program and indicate a need for any such program to consider the perspectives of women to improve follow-up after a positive screening test.
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Affiliation(s)
- Rachel M Morse
- Department of Global Community Health and Behavioral Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA
| | - Magdalena Jurczuk
- Department of Global Community Health and Behavioral Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA
| | | | - Lita E Carrillo Jara
- Department of Cancer Control and Prevention, Dirección Regional de Salud de Loreto, Iquitos, Loreto, Peru
| | - Graciela Meza
- Facultad de Medicina Humana, Universidad Nacional de La Amazonia Peruana, Iquitos, Peru
| | | | - J Kathleen Tracy
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Patti E Gravitt
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Valerie A Paz-Soldan
- Department of Global Community Health and Behavioral Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA.
- Asociación Benéfica PRISMA, Lima, Peru.
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA.
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8
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Gottschlich A, Payne BA, Trawin J, Albert A, Jeronimo J, Mitchell-Foster S, Mithani N, Namugosa R, Naguti P, Orem J, Rawat A, Simelela PN, Singer J, Smith LW, van Niekerk D, Nakisige C, Ogilvie G. Experiences with thermal ablation for cervical precancer treatment after self-collection HPV-based screening in the ASPIRE Mayuge randomized trial. Int J Cancer 2023; 152:1630-1639. [PMID: 36408923 DOI: 10.1002/ijc.34369] [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: 06/16/2022] [Revised: 10/04/2022] [Accepted: 11/09/2022] [Indexed: 11/22/2022]
Abstract
Cervical cancer remains a significant public health burden in low-resourced countries. Thus, the WHO prioritized cervix screening, and recently recommended thermal ablation treatment for cervical precancer. However, there is limited information on side effects during treatment and recovery, and acceptability among those treated. The ASPIRE Mayuge trial recruited women to participate in self-collection cervix screening between 2019 and 2020 (N = 2019). Screen-positive women (N = 531, 26.3%) were referred for visual inspection with acetic acid and thermal ablation treatment, per Uganda Ministry of Health recommendations; 71.2% of those referred attended follow-up. Six months post-screening, a subset of trial participants were recontacted. Those who received thermal ablation completed a survey assessing side effects during and after the procedure, and willingness to recommend the treatment to others. We summarized the results to describe the side effects and acceptability of thermal ablation treatment. Of 2019 participants, 349 (17%) received thermal ablation. A subset of 135 completed the follow-up survey, where 90% reported pain during treatment; however, intensity and duration were low. Over a third of women reported problems with recovery for reasons including pain, discharge and bleeding. Regardless, 98% reported they would recommend the treatment to others. The use of thermal ablation to treat cervical precancer appears to be highly acceptable in this population. While many women reported side effects during the procedure and recovery, the majority said they would recommend the treatment to others. However, given the substantial proportion who reported problems with recovery, efforts should be made to provide additional resources to women after receiving thermal ablation treatment for cervical precancer.
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Affiliation(s)
- Anna Gottschlich
- BC Women's Hospital and Health Center, Women's Health Research Institute, Vancouver, Canada.,University of British Columbia, Faculty of Medicine, Vancouver, Canada
| | - Beth A Payne
- BC Women's Hospital and Health Center, Women's Health Research Institute, Vancouver, Canada.,University of British Columbia, Faculty of Medicine, Vancouver, Canada
| | - Jessica Trawin
- BC Women's Hospital and Health Center, Women's Health Research Institute, Vancouver, Canada
| | - Arianne Albert
- BC Women's Hospital and Health Center, Women's Health Research Institute, Vancouver, Canada
| | | | - Sheona Mitchell-Foster
- BC Women's Hospital and Health Center, Women's Health Research Institute, Vancouver, Canada.,Northern Medical Program, University of British Columbia, Prince George, Canada
| | - Nadia Mithani
- BC Women's Hospital and Health Center, Women's Health Research Institute, Vancouver, Canada
| | | | | | | | - Angeli Rawat
- University of British Columbia, Faculty of Medicine, Vancouver, Canada
| | | | - Joel Singer
- University of British Columbia, Faculty of Medicine, Vancouver, Canada
| | - Laurie W Smith
- BC Women's Hospital and Health Center, Women's Health Research Institute, Vancouver, Canada.,BC Cancer Agency, Vancouver, Canada
| | - Dirk van Niekerk
- University of British Columbia, Faculty of Medicine, Vancouver, Canada.,BC Cancer Agency, Vancouver, Canada
| | | | - Gina Ogilvie
- BC Women's Hospital and Health Center, Women's Health Research Institute, Vancouver, Canada.,University of British Columbia, Faculty of Medicine, Vancouver, Canada
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Pulumati A, Pulumati A, Dwarakanath BS, Verma A, Papineni RVL. Technological advancements in cancer diagnostics: Improvements and limitations. Cancer Rep (Hoboken) 2023; 6:e1764. [PMID: 36607830 PMCID: PMC9940009 DOI: 10.1002/cnr2.1764] [Citation(s) in RCA: 31] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 10/20/2022] [Accepted: 11/27/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Cancer is characterized by the rampant proliferation, growth, and infiltration of malignantly transformed cancer cells past their normal boundaries into adjacent tissues. It is the leading cause of death worldwide, responsible for approximately 19.3 million new diagnoses and 10 million deaths globally in 2020. In the United States alone, the estimated number of new diagnoses and deaths is 1.9 million and 609 360, respectively. Implementation of currently existing cancer diagnostic techniques such as positron emission tomography (PET), X-ray computed tomography (CT), and magnetic resonance spectroscopy (MRS), and molecular diagnostic techniques, have enabled early detection rates and are instrumental not only for the therapeutic management of cancer patients, but also for early detection of the cancer itself. The effectiveness of these cancer screening programs are heavily dependent on the rate of accurate precursor lesion identification; an increased rate of identification allows for earlier onset treatment, thus decreasing the incidence of invasive cancer in the long-term, and improving the overall prognosis. Although these diagnostic techniques are advantageous due to lack of invasiveness and easier accessibility within the clinical setting, several limitations such as optimal target definition, high signal to background ratio and associated artifacts hinder the accurate diagnosis of specific types of deep-seated tumors, besides associated high cost. In this review we discuss various imaging, molecular, and low-cost diagnostic tools and related technological advancements, to provide a better understanding of cancer diagnostics, unraveling new opportunities for effective management of cancer, particularly in low- and middle-income countries (LMICs). RECENT FINDINGS Herein we discuss various technological advancements that are being utilized to construct an assortment of new diagnostic techniques that incorporate hardware, image reconstruction software, imaging devices, biomarkers, and even artificial intelligence algorithms, thereby providing a reliable diagnosis and analysis of the tumor. Also, we provide a brief account of alternative low cost-effective cancer therapy devices (CryoPop®, LumaGEM®, MarginProbe®) and picture archiving and communication systems (PACS), emphasizing the need for multi-disciplinary collaboration among radiologists, pathologists, and other involved specialties for improving cancer diagnostics. CONCLUSION Revolutionary technological advancements in cancer imaging and molecular biology techniques are indispensable for the accurate diagnosis and prognosis of cancer.
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Affiliation(s)
- Akhil Pulumati
- University of Missouri‐Kansas CityKansas CityMissouriUSA
| | - Anika Pulumati
- University of Missouri‐Kansas CityKansas CityMissouriUSA
| | - Bilikere S. Dwarakanath
- Central Research FacilitySri Ramachandra Institute of Higher Education and Research PorurChennaiIndia
- Department of BiotechnologyIndian Academy Degree CollegeBangaloreIndia
| | | | - Rao V. L. Papineni
- PACT & Health LLCBranfordConnecticutUSA
- Department of SurgeryUniversity of Kansas Medical CenterKansas CityKansasUSA
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Boles T, Salcedo MP, Lorenzoni C, Osman N, Baker E, Schmeler K, Carns J. Overview of thermal ablation devices for treating precancerous cervical lesions in low-resource settings. J Glob Health 2022; 12:03089. [PMID: 36579405 PMCID: PMC9798036 DOI: 10.7189/jogh.12.03089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Taylor Boles
- Rice360 Institute for Global Health Technologies, Rice University, Houston, Texas, USA
| | - Mila Pontremoli Salcedo
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Cesaltina Lorenzoni
- Ministry of Health, Maputo, Republic of Mozambique,Universidade Eduardo Mondlane (UEM), Maputo, Mozambique
| | - Nafissa Osman
- Universidade Eduardo Mondlane (UEM), Maputo, Mozambique
| | - Ellen Baker
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Kathleen Schmeler
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jennifer Carns
- Rice360 Institute for Global Health Technologies, Rice University, Houston, Texas, USA,Department of Bioengineering, Rice University, Houston, Texas, USA
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11
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Shastri SS, Temin S, Almonte M, Basu P, Campos NG, Gravitt PE, Gupta V, Lombe DC, Murillo R, Nakisige C, Ogilvie G, Pinder LF, Poli UR, Qiao Y, Woo YL, Jeronimo J. Secondary Prevention of Cervical Cancer: ASCO Resource-Stratified Guideline Update. JCO Glob Oncol 2022; 8:e2200217. [PMID: 36162041 PMCID: PMC9812449 DOI: 10.1200/go.22.00217] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/02/2022] [Accepted: 08/17/2022] [Indexed: 01/07/2023] Open
Abstract
PURPOSE To update resource-stratified, evidence-based recommendations on secondary prevention of cervical cancer globally. METHODS American Society of Clinical Oncology convened a multidisciplinary, multinational Expert Panel to produce recommendations reflecting four resource-tiered settings. A review of existing guidelines, formal consensus-based process, and modified ADAPTE process to adapt existing guidelines was conducted. Other experts participated in formal consensus. RESULTS This guideline update reflects changes in evidence since the previous update. Five existing guidelines were identified and reviewed, and adapted recommendations form the evidence base. Cost-effectiveness analyses provided indirect evidence to inform consensus, which resulted in ≥ 75% agreement. RECOMMENDATIONS Human papillomavirus (HPV) DNA testing is recommended in all resource settings; visual inspection with acetic acid may be used in basic settings. Recommended age ranges and frequencies vary by the following setting: maximal: age 25-65 years, every 5 years; enhanced: age 30-65 years, if two consecutive negative tests at 5-year intervals, then every 10 years; limited: age 30-49 years, every 10 years; basic: age 30-49 years, one to three times per lifetime. For basic settings, visual assessment is used to determine treatment eligibility; in other settings, genotyping with cytology or cytology alone is used to determine treatment. For basic settings, treatment is recommended if abnormal triage results are obtained; in other settings, abnormal triage results followed by colposcopy is recommended. For basic settings, treatment options are thermal ablation or loop electrosurgical excision procedure; for other settings, loop electrosurgical excision procedure or ablation is recommended; with a 12-month follow-up in all settings. Women who are HIV-positive should be screened with HPV testing after diagnosis, twice as many times per lifetime as the general population. Screening is recommended at 6 weeks postpartum in basic settings; in other settings, screening is recommended at 6 months. In basic settings without mass screening, infrastructure for HPV testing, diagnosis, and treatment should be developed.Additional information is available at www.asco.org/resource-stratified-guidelines.
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Affiliation(s)
| | - Sarah Temin
- American Society of Clinical Oncology, Alexandria, VA
| | | | | | - Nicole G Campos
- Harvard University T.H. Chan School of Public Health, Boston, MA
| | | | | | - Dorothy C Lombe
- Regional Cancer Treatment Services, MidCentral District Health Board, Palmerston North, New Zealand
| | | | | | | | | | - Usha R Poli
- India Institute of Public Health, Hyderabad, India
| | - Youlin Qiao
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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12
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Bensemmane S, Loayza Villarroel K, Montaño K, Louati E, Ascarrunz C, Rodriguez P, Fontaine V, Laokri S. Assessing Barriers Encountered by Women in Cervical Cancer Screening and Follow-Up Care in Urban Bolivia, Cochabamba. Healthcare (Basel) 2022; 10:healthcare10091604. [PMID: 36141216 PMCID: PMC9498362 DOI: 10.3390/healthcare10091604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 11/30/2022] Open
Abstract
Background: Timely detection of cervical cells infected with high-risk human papillomavirus (HPV) improves cervical cancer prevention. In Bolivia, actual screening coverage only reaches 33.3% of the target population aged between 25 and 64 years despite free cytology screening. Furthermore, 50% to 80% screened women are lost during follow-up. This study aimed at identifying factors explaining this lack of follow-up care. Method: During the first phase, face-to-face semi-structured interviews were conducted with HPV-positive women. Secondly, we explored the reasons for the non-adherence to the follow-up care: knowledge, perceptions and beliefs about HPV, as well as barriers to healthcare access, using a structured survey on Cochabamba women and healthcare professionals. Results: Barriers to effective follow-up of the targeted populations were associated with health system shortcomings, including poor service delivery at the front- and second-line, health providers shortage, inadequate training, waiting time, high direct and indirect costs of care seeking and care, complex procedures to obtain HPV screening results and poor patient–provider communication. The follow-up was perceived as extremely stressful by the participants. Conclusion: Improved communication on HPV and HPV-related cancers in terms of representation in the general population and among the health professional’s population is vital to improve access for HPV infection follow-up care.
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Affiliation(s)
- Sherihane Bensemmane
- Ecole de Santé Publique, Université libre de Bruxelles (ULB), Route de Lennik, 1070 Brussels, Belgium
- Health Services Research, Epidemiology and Public Health, Sciensano, 1050 Brussels, Belgium
| | - Katherine Loayza Villarroel
- Ecole de Santé Publique, Université libre de Bruxelles (ULB), Route de Lennik, 1070 Brussels, Belgium
- Question Santé asbl, 1050 Brussels, Belgium
| | - Kevin Montaño
- Instituto de Investigacion en Ciencas Sociales INCISO, Universidad Mayor de San Simon (UMSS), Cochabamba, Bolivia
| | - Elyas Louati
- Faculté de Pharmacie, Université libre de Bruxelles (ULB), Campus Plaine, Boulevard du Triomphe, 1050 Brussels, Belgium
| | - Carla Ascarrunz
- Instituto de Investigacion en Ciencas Sociales INCISO, Universidad Mayor de San Simon (UMSS), Cochabamba, Bolivia
| | - Patricia Rodriguez
- Laboratorio de Virologia, Facultad de Medicina, UMSS, Cochabamba, Bolivia
| | - Véronique Fontaine
- Faculté de Pharmacie, Université libre de Bruxelles (ULB), Campus Plaine, Boulevard du Triomphe, 1050 Brussels, Belgium
- Correspondence: ; Tel.: +32-2-6505296
| | - Samia Laokri
- Faculté de Pharmacie, Université libre de Bruxelles (ULB), Campus Plaine, Boulevard du Triomphe, 1050 Brussels, Belgium
- School of Public Health and Tropical Medicine, Tulane University, 1440 Canal St, New Orleans, LA 70112, USA
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13
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Prudden HJ, Achilles SL, Schocken C, Broutet N, Canfell K, Akaba H, Basu P, Bhatla N, Chirenje ZM, Delany-Moretlwe S, Denny L, Gamage DG, Herrero R, Hutubessy R, Villa LL, Murillo R, Schiller JT, Stanley M, Temmerman M, Zhao F, Ogilvie G, Kaslow DC, Dull P, Gottlieb SL. Understanding the public health value and defining preferred product characteristics for therapeutic human papillomavirus (HPV) vaccines: World Health Organization consultations, October 2021-March 2022. Vaccine 2022; 40:5843-5855. [PMID: 36008233 DOI: 10.1016/j.vaccine.2022.08.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 08/10/2022] [Indexed: 11/30/2022]
Abstract
The World Health Organization (WHO) global strategy to eliminate cervical cancer (CxCa) could result in >62 million lives saved by 2120 if strategy targets are reached and maintained: 90% of adolescent girls receiving prophylactic human papillomavirus (HPV) vaccine, 70% of women receiving twice-lifetime cervical cancer screening, and 90% of cervical pre-cancer lesions and invasive CxCa treated. However, the cost and complexity of CxCa screening and treatment approaches has hampered scale-up, particularly in low- and middle-income countries (LMICs), and new approaches are needed. Therapeutic HPV vaccines (TxV), which could clear persistent high-risk HPV infection and/or cause regression of pre-cancerous lesions, are in early clinical development and might offer one such approach. During October 2021 to March 2022, WHO, in collaboration with the Bill and Melinda Gates Foundation, convened a series of global expert consultations to lay the groundwork for understanding the potential value of TxV in the context of current CxCa prevention efforts and for defining WHO preferred product characteristics (PPCs) for TxV. WHO PPCs describe preferences for vaccine attributes that would help optimize vaccine value and use in meeting the global public health need. This paper reports on the main discussion points and findings from the expert consultations. Experts identified several ways in which TxV might address challenges in current CxCa prevention programmes, but emphasized that the potential value of TxV will depend on their degree of efficacy and how quickly they can be developed and implemented relative to ongoing scale-up of existing interventions. Consultation participants also discussed potential use-cases for TxV, important PPC considerations (e.g., vaccine indications, target populations, and delivery strategies), and critical modelling needs for predicting TxV impact and cost-effectiveness.
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Affiliation(s)
| | | | | | | | - Karen Canfell
- The Daffodil Centre, The University of Sydney, Cancer Council NSW, Australia
| | | | - Partha Basu
- International Agency for Research on Cancer, France
| | - Neerja Bhatla
- All India Institute of Medical Sciences, New Delhi, India
| | | | | | - Lynette Denny
- University of Cape Town, SA MRC Gynaecology Cancer Research, South Africa
| | | | | | | | | | | | | | | | | | - Fanghui Zhao
- National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, China
| | - Gina Ogilvie
- School of Population and Public Health, Faculty of Medicine, University of British Columbia, Canada
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14
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Maluf FC, Dal Molin GZ, de Melo AC, Paulino E, Racy D, Ferrigno R, Uson Junior PLS, Ribeiro R, Moretti R, Sadalla JC, Nogueira-Rodrigues A, Carvalho FM, Baiocchi G, Callegaro-Filho D, Abu-Rustum NR. Recommendations for the prevention, screening, diagnosis, staging, and management of cervical cancer in areas with limited resources: Report from the International Gynecological Cancer Society consensus meeting. Front Oncol 2022; 12:928560. [PMID: 36059643 PMCID: PMC9434552 DOI: 10.3389/fonc.2022.928560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 08/01/2022] [Indexed: 12/24/2022] Open
Abstract
Introduction Nearly 85% of cervical cancer new cases are diagnosed in limited resources countries. Although several strategies have been proposed to reduce the disease burden, challenges remain to provide the best possible care. We report recommendations from an expert consensus meeting convened to address from prevention to management of cervical cancer in limited resources countries. Methods The expert panel, composed by invited specialists from 38 developing countries in Africa, Asia, Eastern Europe, Latin America, and the Middle East, convened in Rio de Janeiro in September 2019, during the Global Meeting of the International Gynecological Cancer Society (IGCS). Panel members considered the published scientific evidence and their practical experience on the topics, as well as the perceived cost-effectiveness of, and access to, the available interventions. The focus of the recommendations was on geographic regions rather than entire countries because medical practice varies considerably in the countries represented. Resource limitation was qualified as limited access to qualified surgeons, contemporary imaging or radiation-oncology techniques, antineoplastic drugs, or overall funding for provision of state-of-the-art care. Consensus was defined as at least 75% of the voting members selecting a particular answer of the multiple-choice questionnaire, whereas the majority vote was considered as 50% to 74.9%. Results Consensus was reached for 25 of the 121 (20.7%) questions, whereas for 54 (44.6%) questions there was one option garnering between 50% to 74.9% of votes (majority votes). For the remaining questions, considerable heterogeneity in responses was observed. Discussion The implementation of international guidelines is challenging in countries with resource limitations or unique health-care landscapes. The development of guidelines by the health care providers in those regions is more reflective of the reality on the ground and may improve medical practice and patient care. However, challenges remain toward achieving that goal at political, economic, social, and medical levels.
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Affiliation(s)
- Fernando Cotait Maluf
- Hospital Beneficiência Portuguesa (BP) Mirante, São Paulo, Brazil
- Hospital Israelita Albert Einstein, São Paulo, Brazil
- *Correspondence: Fernando Cotait Maluf,
| | | | | | | | - Douglas Racy
- Hospital Beneficiência Portuguesa (BP) Mirante, São Paulo, Brazil
| | - Robson Ferrigno
- Hospital Beneficiência Portuguesa (BP) Mirante, São Paulo, Brazil
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15
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Giuli MV, Mancusi A, Giuliani E, Screpanti I, Checquolo S. Notch signaling in female cancers: a multifaceted node to overcome drug resistance. CANCER DRUG RESISTANCE (ALHAMBRA, CALIF.) 2022; 4:805-836. [PMID: 35582386 PMCID: PMC8992449 DOI: 10.20517/cdr.2021.53] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/29/2021] [Accepted: 08/03/2021] [Indexed: 12/24/2022]
Abstract
Drug resistance is one of the main challenges in cancer therapy, including in the treatment of female-specific malignancies, which account for more than 60% of cancer cases among women. Therefore, elucidating the underlying molecular mechanisms is an urgent need in gynecological cancers to foster novel therapeutic approaches. Notably, Notch signaling, including either receptors or ligands, has emerged as a promising candidate given its multifaceted role in almost all of the hallmarks of cancer. Concerning the connection between Notch pathway and drug resistance in the afore-mentioned tumor contexts, several studies focused on the Notch-dependent regulation of the cancer stem cell (CSC) subpopulation or the induction of the epithelial-to-mesenchymal transition (EMT), both features implicated in either intrinsic or acquired resistance. Indeed, the present review provides an up-to-date overview of the published results on Notch signaling and EMT- or CSC-driven drug resistance. Moreover, other drug resistance-related mechanisms are examined such as the involvement of the Notch pathway in drug efflux and tumor microenvironment. Collectively, there is a long way to go before every facet will be fully understood; nevertheless, some small pieces are falling neatly into place. Overall, the main aim of this review is to provide strong evidence in support of Notch signaling inhibition as an effective strategy to evade or reverse resistance in female-specific cancers.
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Affiliation(s)
- Maria V Giuli
- Laboratory of Molecular Pathology, Department of Molecular Medicine, Sapienza University, Rome 00161, Italy
| | - Angelica Mancusi
- Laboratory of Molecular Pathology, Department of Molecular Medicine, Sapienza University, Rome 00161, Italy
| | - Eugenia Giuliani
- Scientific Direction, San Gallicano Dermatological Institute IRCCS, Rome 00144, Italy
| | - Isabella Screpanti
- Laboratory of Molecular Pathology, Department of Molecular Medicine, Sapienza University, Rome 00161, Italy
| | - Saula Checquolo
- Department of Medico-Surgical Sciences and Biotechnology, Sapienza University, Latina 04100, Italy.,Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Rome 00161, Italy
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16
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Piret EM, Payne BA, Smith LW, Trawin J, Orem J, Ogilvie G, Nakisige C. Side effects and acceptability measures for thermal ablation as a treatment for cervical precancer in low-income and middle-income countries: a systematic review and meta-synthesis. Fam Med Community Health 2022; 10:fmch-2021-001541. [PMID: 35523456 PMCID: PMC9083391 DOI: 10.1136/fmch-2021-001541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Objective Understanding the side effects and acceptability of thermal ablation (TA) is necessary before large-scale application in screen-and-treat programmes can be justified in low-income and middle-income countries (LMICs). Design Articles were selected for inclusion by two independent reviewers. Risk of bias was assessed using the Downs and Black’s criteria. Summary data were extracted, and authors contacted for data when necessary. Proportions of interest and 95% CIs were estimated using a random effects model. Subgroup analysis was performed based on place of treatment and timing of post-treatment follow-up. Heterogeneity was estimated using the I2. Eligibility criteria Studies that reported one or more side effects or patient acceptability measures after treatment of the cervix using TA in women living in LMICs who completed a cervical cancer screening test. Included articles were clinical trials or observational studies available in English and published before 18 December 2020. Information sources Ovid MEDLINE, EMBASE, CINAHL, CAB Global Health and WHO Global Index Medicus were searched for this systematic review and meta-synthesis. Results A total of 1590 abstracts were screened, 84 full text papers reviewed and 15 papers selected for inclusion in the qualitative review, 10 for meta-synthesis (N=2039). Significant heterogeneity was found in screening tests used to identify women eligible for TA and in methods to ascertain side effects. The most commonly reported side effect during treatment was pain (70%, 95% CI 52% to 85%; I2=98.01%) (8 studies; n=1454). No women discontinued treatment due to pain. At treatment follow-up, common side effects included vaginal discharge (72%, 95% CI 18% to 100%; I2=99.55%) (5 studies; n=771) and bleeding (38%, 95% CI 15% to 64%; I2=98.14%) (4 studies; n=856). Satisfaction with treatment was high in 99% (95% CI 98% to 100%; I2=0.00%) of women (3 studies; n=679). Conclusions TA results in a number of common side effects, though acceptability remains high among women treated in LMICs. Standardised side effect and acceptability reporting are needed as TA becomes more readily available. PROSPERO registration number CRD42020197605.
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Affiliation(s)
- Evelyne Marie Piret
- British Columbia Women's Hospital and Health Centre, Women's Health Research Institute, Vancouver, British Columbia, Canada.,Faculty of Medicine, School of Population and Public Health, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Beth A Payne
- British Columbia Women's Hospital and Health Centre, Women's Health Research Institute, Vancouver, British Columbia, Canada.,Faculty of Medicine, School of Population and Public Health, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Laurie W Smith
- British Columbia Women's Hospital and Health Centre, Women's Health Research Institute, Vancouver, British Columbia, Canada
| | - Jessica Trawin
- British Columbia Women's Hospital and Health Centre, Women's Health Research Institute, Vancouver, British Columbia, Canada
| | - Jackson Orem
- Department of Reproductive Oncology, Uganda Cancer Institute, Kampala, Uganda
| | - Gina Ogilvie
- British Columbia Women's Hospital and Health Centre, Women's Health Research Institute, Vancouver, British Columbia, Canada.,Faculty of Medicine, School of Population and Public Health, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Carolyn Nakisige
- Department of Reproductive Oncology, Uganda Cancer Institute, Kampala, Uganda
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17
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Mwanahamuntu M, Kapambwe S, Pinder LF, Matambo J, Chirwa S, Chisele S, Basu P, Prendiville W, Sankaranarayanan R, Parham GP. The use of thermal ablation in diverse cervical cancer "screen-and-treat" service platforms in Zambia. Int J Gynaecol Obstet 2022; 157:85-89. [PMID: 34197624 DOI: 10.1002/ijgo.13808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 06/17/2021] [Accepted: 06/30/2021] [Indexed: 11/07/2022]
Abstract
OBJECTIVE Thermal ablation (TA) was implemented in public sector cervical cancer prevention services in Zambia in 2012. Initially introduced as a treatment modality in primary healthcare clinics, it was later included in mobile outreach campaigns and clinical research trials. We report the feasibility, acceptability, safety, and provider uptake of TA in diverse clinical contexts. METHODS Screening services based on visual inspection with acetic acid were offered by trained nurses to non-pregnant women aged 25-59 years. Women with a type 1 transformation zone (TZ) were treated with same-visit TA. Those with a type 2 or 3 TZ, or suspicious for cancer, were managed with same-visit electrosurgical excision or punch biopsy, respectively. A provider survey was conducted. RESULTS Between 2012 and 2020, 2123 women were treated with TA: primary healthcare clinics, n = 746; mobile outreach clinics, n = 1127; research clinics, n = 250. Of the 996 women treated in primary healthcare and research clinics, 359 (48%) were HIV positive. Mild cramping during treatment was the most common adverse effect. No treatment interruptions occurred. No major complications were reported in the early (6 weeks) follow-up period. Providers expressed an overwhelming preference for TA over cryotherapy. CONCLUSION TA was feasible, safe, and acceptable in diverse clinical contexts. It was the preferred ablation method of providers when compared with cryotherapy.
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Affiliation(s)
- Mulindi Mwanahamuntu
- Department of Obstetrics and Gynecology, Women and Newborn Hospital, Lusaka, Zambia
| | | | - Leeya F Pinder
- Department of Obstetrics and Gynecology, Women and Newborn Hospital, Lusaka, Zambia
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, USA
| | - Jane Matambo
- Center for Infectious Disease Research in Zambia, Cervical Cancer Prevention Program, Lusaka, Zambia
| | - Susan Chirwa
- Center for Infectious Disease Research in Zambia, Cervical Cancer Prevention Program, Lusaka, Zambia
| | - Samson Chisele
- Department of Obstetrics and Gynecology, Women and Newborn Hospital, Lusaka, Zambia
| | - Partha Basu
- International Agency for Research on Cancer, WHO Screening Group, Early Detection and Prevention Section, Lyon, France
| | - Walter Prendiville
- International Agency for Research on Cancer, WHO Screening Group, Early Detection and Prevention Section, Lyon, France
| | - Rengaswamy Sankaranarayanan
- International Agency for Research on Cancer, WHO Screening Group, Early Detection and Prevention Section, Lyon, France
| | - Groesbeck P Parham
- Department of Obstetrics and Gynecology, Women and Newborn Hospital, Lusaka, Zambia
- Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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18
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Chelales E, Morhard R, Nief C, Crouch B, Everitt JI, Sag AA, Ramanujam N. Radiologic-pathologic analysis of increased ethanol localization and ablative extent achieved by ethyl cellulose. Sci Rep 2021; 11:20700. [PMID: 34667252 PMCID: PMC8526742 DOI: 10.1038/s41598-021-99985-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 09/29/2021] [Indexed: 12/24/2022] Open
Abstract
Ethanol provides a rapid, low-cost ablative solution for liver tumors with a small technological footprint but suffers from uncontrolled diffusion in target tissue, limiting treatment precision and accuracy. Incorporating the gel-forming polymer ethyl cellulose to ethanol localizes the distribution. The purpose of this study was to establish a non-invasive methodology based on CT imaging to quantitatively determine the relationship between the delivery parameters of the EC-ethanol formulation, its distribution, and the corresponding necrotic volume. The relationship of radiodensity to ethanol concentration was characterized with water-ethanol surrogates. Ex vivo EC-ethanol ablations were performed to optimize the formulation (n = 6). In vivo ablations were performed to compare the optimal EC-ethanol formulation to pure ethanol (n = 6). Ablations were monitored with CT and ethanol distribution volume was quantified. Livers were removed, sectioned and stained with NADH-diaphorase to determine the ablative extent, and a detailed time-course histological study was performed to assess the wound healing process. CT imaging of ethanol-water surrogates demonstrated the ethanol concentration-radiodensity relationship is approximately linear. A concentration of 12% EC in ethanol created the largest distribution volume, more than eight-fold that of pure ethanol, ex vivo. In vivo, 12% EC-ethanol was superior to pure ethanol, yielding a distribution volume three-fold greater and an ablation zone six-fold greater than pure ethanol. Finally, a time course histological evaluation of the liver post-ablation with 12% EC-ethanol and pure ethanol revealed that while both induce coagulative necrosis and similar tissue responses at 1-4 weeks post-ablation, 12% EC-ethanol yielded a larger ablation zone. The current study demonstrates the suitability of CT imaging to determine distribution volume and concentration of ethanol in tissue. The distribution volume of EC-ethanol is nearly equivalent to the resultant necrotic volume and increases distribution and necrosis compared to pure ethanol.
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Affiliation(s)
- Erika Chelales
- Department of Biomedical Engineering, Duke University, Durham, NC, USA.
| | - Robert Morhard
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Corrine Nief
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Brian Crouch
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Jeffrey I Everitt
- Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Alan Alper Sag
- Division of Vascular and Interventional Radiology, Department of Radiology, Duke University Medical Center, Durham, NC, USA
| | - Nirmala Ramanujam
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
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19
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Ma CH, Yang J, Mueller JL, Huang HC. Intratumoral Photosensitizer Delivery and Photodynamic Therapy. ACTA ACUST UNITED AC 2021; 11. [PMID: 34484435 DOI: 10.1142/s179398442130003x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Photodynamic therapy (PDT) is a two-step procedure that involves the administration of special drugs, commonly called photosensitizers, followed by the application of certain wavelengths of light. The light activates these photosensitizers to produce reactive molecular species that induce cell death in tissues. There are numerous factors to consider when selecting the appropriate photosensitizer administration route, such as which part of the body is being targeted, the pharmacokinetics of photosensitizers, and the formulation of photosensitizers. While intravenous, topical, and oral administration of photosensitizers are widely used in preclinical and clinical applications of PDT, other administration routes, such as intraperitoneal, intra-arterial, and intratumoral injections, are gaining traction for their potential in treating advanced diseases and reducing off-target toxicities. With recent advances in targeted nanotechnology, biomaterials, and light delivery systems, the exciting possibilities of targeted photosensitizer delivery can be fully realized for preclinical and clinical applications. Further, in light of the growing burden of cancer mortality in low and middle-income countries and development of low-cost light sources and photosensitizers, PDT could be used to treat cancer patients in low-income settings. This short article introduces aspects of interfaces of intratumoral photosensitizer injections and nano-biomaterials for PDT applications in both high-income and low-income settings but does not present a comprehensive review due to space limitations.
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Affiliation(s)
- Chen-Hua Ma
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Jeffrey Yang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Jenna L Mueller
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA.,Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Huang-Chiao Huang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA.,Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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20
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Abstract
Cervical cancer is one of the commonest cancers afflicting women in low and middle income countries, however, both primary prevention with human papillomavirus vaccination, and secondary prevention with screening programs and treatment of preinvasive disease are possible. A coordinated approach to eliminating cervical cancer, as has been called for by the World Health Organization, requires a complex series of steps at all levels of a health system. This article outlines the current state of cervical cancer prevention in low and middle income countries, the innovations being employed to improve outcomes, and consideration of the next steps needed as we move towards global elimination.
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Affiliation(s)
- Emma R Allanson
- Department of Gynecologic Oncology and Reproductive Medicine, MD Anderson Cancer Center, Houston, Texas
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21
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Mueller JL, Morhard R, DeSoto M, Chelales E, Yang J, Nief C, Crouch B, Everitt J, Previs R, Katz D, Ramanujam N. Optimizing ethyl cellulose-ethanol delivery towards enabling ablation of cervical dysplasia. Sci Rep 2021; 11:16869. [PMID: 34413378 PMCID: PMC8376953 DOI: 10.1038/s41598-021-96223-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 08/05/2021] [Indexed: 11/08/2022] Open
Abstract
In low-income countries, up to 80% of women diagnosed with cervical dysplasia do not return for follow-up care, primarily due to treatment being inaccessible. Here, we describe development of a low-cost, portable treatment suitable for such settings. It is based on injection of ethyl cellulose (EC)-ethanol to ablate the transformation zone around the os, the site most impacted by dysplasia. EC is a polymer that sequesters the ethanol within a prescribed volume when injected into tissue, and this is modulated by the injected volume and delivery parameters (needle gauge, bevel orientation, insertion rate, depth, and infusion rate). Salient injection-based delivery parameters were varied in excised swine cervices. The resulting injection distribution volume was imaged with a wide-field fluorescence imaging device or computed tomography. A 27G needle and insertion rate of 10 mm/s achieved the desired insertion depth in tissue. Orienting the needle bevel towards the outer edge of the cervix and keeping infusion volumes ≤ 500 µL minimized leakage into off-target tissue. These results guided development of a custom hand-held injector, which was used to locate and ablate the upper quadrant of a swine cervix in vivo with no adverse events or changes in host temperature or heart rate. After 24 h, a distinct region of necrosis was detected that covered a majority (> 75%) of the upper quadrant of the cervix, indicating four injections could effectively cover the full cervix. The work here informs follow up large animal in vivo studies, e.g. in swine, to further assess safety and efficacy of EC-ethanol ablation in the cervix.
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Affiliation(s)
- Jenna L Mueller
- Department of Bioengineering, University of Maryland, 3102 A. James Clark Hall, 8278 Paint Branch Drive, College Park, MD, 20742, USA.
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA.
| | - Robert Morhard
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Michael DeSoto
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Erika Chelales
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Jeffrey Yang
- Department of Bioengineering, University of Maryland, 3102 A. James Clark Hall, 8278 Paint Branch Drive, College Park, MD, 20742, USA
| | - Corrine Nief
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Brian Crouch
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Jeffrey Everitt
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA
| | - Rebecca Previs
- Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, Duke University Medical Center, Durham, NC, USA
| | - David Katz
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, Duke University Medical Center, Durham, NC, USA
| | - Nimmi Ramanujam
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- Duke Global Health Institute, Duke University, Durham, NC, USA
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
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22
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Mungo C, Osongo CO, Ambaka J, Randa MA, Omoto J, Cohen CR, Huchko M. Safety and Acceptability of Thermal Ablation for Treatment of Human Papillomavirus Among Women Living With HIV in Western Kenya. JCO Glob Oncol 2021; 6:1024-1033. [PMID: 32634066 PMCID: PMC7392781 DOI: 10.1200/go.20.00035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
PURPOSE The WHO now recommends thermal ablation as an alternative to cryotherapy within “screen-and-treat” cervical cancer programs in low- and middle-income countries (LMICs). We conducted a safety and acceptability clinical trial of thermal ablation in a Kenyan Ministry of Health hospital among women living with HIV (WLWH; ClinicalTrials.gov identifier: NCT04191967). METHODS Between August 2019 and February 2020, WLWH age 25-65 years underwent human papillomavirus (HPV) self-collection in western Kenya. HPV-positive women underwent visual inspection with acetic acid, biopsy, and treatment with thermal ablation performed by a nonphysician clinician, if eligible by standard guidelines. A questionnaire was administered after treatment to assess for pain and treatment acceptability. Adverse events (AEs) were evaluated 4-6 weeks after treatment with a standardized grading tool. RESULTS A total of 293 HPV-positive WLWH underwent thermal ablation in the study period. The mean age was 40.4 years (standard deviation, 8.7 years). After treatment, 15 (5.1%), 231 (78.8%), 42 (14.3%), and 5 (1.8%) reported none, mild, moderate, and severe pain with treatment, respectively. At follow-up, spotting, vaginal discharge, and pelvic pain were reported by 99 (37.8%), 258 (98.5%), and 46 (17.6%), respectively, for a median of 3.3 (interquartile range [IQR], 2-3), 14 (IQR, 7-21), and 7 (IQR, 3-7) days, respectively. Most participants graded their AEs as mild (grade 1): 94 (95.0%) for bleeding, 125 (48.5%) for vaginal discharge, and 37 (80.4%) for pelvic pain. No grade 3 or 4 AEs were reported. The vast majority (99.2%) were satisfied with the treatment and would recommend it to a friend. CONCLUSION Thermal ablation performed by nonphysicians in the public health sector in Kenya proved safe and highly acceptable in treating HPV-positive WLWH.
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Affiliation(s)
- Chemtai Mungo
- Division of Prevention Science, Center for AIDS Prevention Studies, University of California, San Francisco, San Francisco, CA
| | | | | | | | - Jackton Omoto
- Department of Obstetrics and Gynecology, Maseno University School of Medicine, Kisumu, Kenya
| | - Craig R Cohen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, San Francisco, CA
| | - Megan Huchko
- Department of Obstetrics and Gynecology, Duke University, Durham, NC
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Wentzensen N, Chirenje ZM, Prendiville W. Treatment approaches for women with positive cervical screening results in low-and middle-income countries. Prev Med 2021; 144:106439. [PMID: 33678236 DOI: 10.1016/j.ypmed.2021.106439] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 01/13/2021] [Accepted: 01/16/2021] [Indexed: 12/14/2022]
Abstract
The primary goal of cervical screening is to identify women with cervical precancers who need treatment to prevent invasive cervical cancer. Cervical cancer screening programs in high-resource settings rely on a multi-step process to reassure the majority of women of low cancer risk and treat the small number of women at high risk of precancer and cancer. The requirement of major resource investment for training and capacity building of multi-step cervical cancer screening programs prevents their introduction in low- and middle-income countries (LMICs). Screen-and-treat programs have been evaluated and introduced in some countries that use mainly ablative treatment as primary treatment options. Ablative treatment with cryotherapy and thermal ablation has a favorable tradeoff of benefits and harms and can be introduced more widely than excisional treatment in LMICs. While most women below 40 are eligible for ablative procedures, fewer than 50% are eligible by age 50 and ablative treatment is not appropriate over age 50. Excisional treatment is required for women ineligible for ablative treatment. Since screening programs in LMICs necessarily detect invasive cancers, cancer treatment and palliative care needs to be considered as well.
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Affiliation(s)
- Nicolas Wentzensen
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA.
| | - Z Mike Chirenje
- Department of Obstetrics and Gynaecology, College of Health Sciences, University of Zimbabwe and Bixby Center for Global Health, UCSF, San Francisco, USA
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Lemp JM, De Neve JW, Bussmann H, Chen S, Manne-Goehler J, Theilmann M, Marcus ME, Ebert C, Probst C, Tsabedze-Sibanyoni L, Sturua L, Kibachio JM, Moghaddam SS, Martins JS, Houinato D, Houehanou C, Gurung MS, Gathecha G, Farzadfar F, Dryden-Peterson S, Davies JI, Atun R, Vollmer S, Bärnighausen T, Geldsetzer P. Lifetime Prevalence of Cervical Cancer Screening in 55 Low- and Middle-Income Countries. JAMA 2020; 324:1532-1542. [PMID: 33079153 PMCID: PMC7576410 DOI: 10.1001/jama.2020.16244] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 08/10/2020] [Indexed: 12/11/2022]
Abstract
Importance The World Health Organization is developing a global strategy to eliminate cervical cancer, with goals for screening prevalence among women aged 30 through 49 years. However, evidence on prevalence levels of cervical cancer screening in low- and middle-income countries (LMICs) is sparse. Objective To determine lifetime cervical cancer screening prevalence in LMICs and its variation across and within world regions and countries. Design, Setting, and Participants Analysis of cross-sectional nationally representative household surveys carried out in 55 LMICs from 2005 through 2018. The median response rate across surveys was 93.8% (range, 64.0%-99.3%). The population-based sample consisted of 1 136 289 women aged 15 years or older, of whom 6885 (0.6%) had missing information for the survey question on cervical cancer screening. Exposures World region, country; countries' economic, social, and health system characteristics; and individuals' sociodemographic characteristics. Main Outcomes and Measures Self-report of having ever had a screening test for cervical cancer. Results Of the 1 129 404 women included in the analysis, 542 475 were aged 30 through 49 years. A country-level median of 43.6% (interquartile range [IQR], 13.9%-77.3%; range, 0.3%-97.4%) of women aged 30 through 49 years self-reported to have ever been screened, with countries in Latin America and the Caribbean having the highest prevalence (country-level median, 84.6%; IQR, 65.7%-91.1%; range, 11.7%-97.4%) and those in sub-Saharan Africa the lowest prevalence (country-level median, 16.9%; IQR, 3.7%-31.0%; range, 0.9%-50.8%). There was large variation in the self-reported lifetime prevalence of cervical cancer screening among countries within regions and among countries with similar levels of per capita gross domestic product and total health expenditure. Within countries, women who lived in rural areas, had low educational attainment, or had low household wealth were generally least likely to self-report ever having been screened. Conclusions and Relevance In this cross-sectional study of data collected in 55 low- and middle-income countries from 2005 through 2018, there was wide variation between countries in the self-reported lifetime prevalence of cervical cancer screening. However, the median prevalence was only 44%, supporting the need to increase the rate of screening.
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Affiliation(s)
- Julia M. Lemp
- Heidelberg Institute of Global Health (HIGH), Medical Faculty and University Hospital, University of Heidelberg, Heidelberg, Germany
| | - Jan-Walter De Neve
- Heidelberg Institute of Global Health (HIGH), Medical Faculty and University Hospital, University of Heidelberg, Heidelberg, Germany
| | - Hermann Bussmann
- Department of Applied Tumor Biology, Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
| | - Simiao Chen
- Heidelberg Institute of Global Health (HIGH), Medical Faculty and University Hospital, University of Heidelberg, Heidelberg, Germany
- Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing
| | - Jennifer Manne-Goehler
- Division of Infectious Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
- Medical Practice Evaluation Center, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Michaela Theilmann
- Heidelberg Institute of Global Health (HIGH), Medical Faculty and University Hospital, University of Heidelberg, Heidelberg, Germany
| | - Maja-Emilia Marcus
- Department of Economics and Centre for Modern Indian Studies, University of Goettingen, Göttingen, Germany
| | - Cara Ebert
- RWI–Leibniz Institute for Economic Research, Essen (Berlin office), Germany
| | - Charlotte Probst
- Heidelberg Institute of Global Health (HIGH), Medical Faculty and University Hospital, University of Heidelberg, Heidelberg, Germany
- Institute for Mental Health Policy Research, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada
| | | | - Lela Sturua
- Non-Communicable Disease Department, National Center for Disease Control and Public Health, Tbilisi, Georgia
| | - Joseph M. Kibachio
- Division of Non-Communicable Diseases, Kenya Ministry of Health, Nairobi, Kenya
- Institute of Global Health, Faculty of Medicine, University of Geneva (UNIGE), Geneva, Switzerland
| | - Sahar Saeedi Moghaddam
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Joao S. Martins
- Faculty of Medicine and Health Sciences, Universidade Nacional Timor Lorosa’e, Rua Jacinto Candido, Dili, Timor-Leste
| | - Dismand Houinato
- Laboratory of Epidemiology of Chronic and Neurological Diseases, Faculty of Health Sciences, University of Abomey-Calavi, Cotonou, Benin
| | - Corine Houehanou
- Laboratory of Epidemiology of Chronic and Neurological Diseases, Faculty of Health Sciences, University of Abomey-Calavi, Cotonou, Benin
| | - Mongal S. Gurung
- Health Research and Epidemiology Unit, Ministry of Health, Thimphu, Bhutan
| | - Gladwell Gathecha
- Division of Non-Communicable Diseases, Kenya Ministry of Health, Nairobi, Kenya
| | - Farshad Farzadfar
- Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Scott Dryden-Peterson
- Division of Infectious Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
- Botswana Harvard AIDS Institute, Gaborone, Botswana
| | - Justine I. Davies
- MRC/Wits Rural Public Health and Health Transitions Research Unit, University of Witwatersrand School of Public Health, Johannesburg, South Africa
- Institute of Applied Health Research, University of Birmingham, Birmingham, United Kingdom
| | - Rifat Atun
- Department of Global Health and Population at the Harvard T.H. Chan School of Public Health, Boston, Massachusetts
- Department of Global Health and Social Medicine at the Harvard Medical School, Boston, Massachusetts
| | - Sebastian Vollmer
- Department of Economics and Centre for Modern Indian Studies, University of Goettingen, Göttingen, Germany
| | - Till Bärnighausen
- Heidelberg Institute of Global Health (HIGH), Medical Faculty and University Hospital, University of Heidelberg, Heidelberg, Germany
- Department of Global Health and Population at the Harvard T.H. Chan School of Public Health, Boston, Massachusetts
- Africa Health Research Institute, Somkhele, South Africa
| | - Pascal Geldsetzer
- Heidelberg Institute of Global Health (HIGH), Medical Faculty and University Hospital, University of Heidelberg, Heidelberg, Germany
- Division of Primary Care and Population Health, Department of Medicine, Stanford University, Stanford, California
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Slavkovsky RC, Bansil P, Sandoval MA, Figueroa J, Rodriguez DM, Lobo JS, Jeronimo JA, de Sanjosé S. Health Outcomes at 1 Year After Thermal Ablation for Cervical Precancer Among Human Papillomavirus- and Visual Inspection With Acetic Acid-Positive Women in Honduras. JCO Glob Oncol 2020; 6:1565-1573. [PMID: 33074738 PMCID: PMC7605374 DOI: 10.1200/go.20.00400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
PURPOSE This study aims to assess the detection of cervical intraepithelial lesions grades 2 and 3 (CIN2-3) at 1 year after treatment with thermal ablation among human papillomavirus (HPV)–positive and visual inspection with acetic acid (VIA)–positive women. METHODS All women screened and triaged for cervical cancer at four government health facilities in Honduras who were eligible for ablative treatment were enrolled and treated with thermal ablation. Women with confirmed CIN2-3 and a subset of women with CIN1/normal diagnoses at baseline were evaluated at 12 months. Follow-up procedures included HPV testing (careHPV), VIA, directed biopsy (if VIA-positive), and Papanicolaou test (if HPV positive, VIA negative). Outcomes at 1 year included histologic or cytologic assessment of CIN lesions among those with any abnormal test. RESULTS Among the 319 women treated with thermal ablation, baseline histologic diagnoses were available for 317. Two (0.6%) had invasive cancer, 36 (11.4%) had CIN3, 40 (12.6%) had CIN2, and 239 (75.4%) had CIN1/normal histology. Among the 127 women eligible for follow-up, 118 (92.9%) completed all study procedures at 1 year. Overall, 98 (83.1%) had no evidence of CIN2-3 or persistent low-grade infection, 13 (11.2%) had CIN1/atypical squamous cells of undetermined significance, six (5.1%) had CIN2/high-grade squamous intraepithelial lesion, and 1 (0.8%) had a persistent CIN3. No adverse events associated with thermal ablation at 1 year were registered. CONCLUSION A high proportion of women had no evidence of CIN2-3 at 1 year after thermal ablation treatment. Thermal ablation is an alternative to cryotherapy that may facilitate greater treatment coverage and prevent unnecessary deaths from cervical cancer.
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Affiliation(s)
| | | | - Manuel A Sandoval
- Asociación Hondureña de Planificación de Familia (ASHONPLAFA), Tegucigalpa, Honduras
| | | | - Doris M Rodriguez
- Asociación Hondureña de Planificación de Familia (ASHONPLAFA), Tegucigalpa, Honduras
| | - Jose Saul Lobo
- Asociación Hondureña de Planificación de Familia (ASHONPLAFA), Tegucigalpa, Honduras
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de Fouw M, Oosting RM, Eijkel BIM, van Altena PFJ, Peters AAW, Dankelman J, Beltman JJ. Comparison of the tissue interaction between thermal ablation and cryotherapy as treatment for cervical precancerous lesions in an ex-vivo model. HEALTH AND TECHNOLOGY 2020. [DOI: 10.1007/s12553-020-00459-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Morhard R, Mueller JL, Tang Q, Nief C, Chelales E, Lam CT, Alvarez DA, Rubinstein M, Katz DF, Ramanujam N. Understanding Factors Governing Distribution Volume of Ethyl Cellulose-Ethanol to Optimize Ablative Therapy in the Liver. IEEE Trans Biomed Eng 2020; 67:2337-2348. [PMID: 31841399 PMCID: PMC7295656 DOI: 10.1109/tbme.2019.2960049] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVE Ethanol ablation, the injection of ethanol to induce necrosis, was originally used to treat hepatocellular carcinoma, with survival rates comparable to surgery. However, efficacy is limited due to leakage into surrounding tissue. To reduce leakage, we previously reported incorporating ethyl cellulose (EC) with ethanol as this mixture forms a gel when injected into tissue. To further develop EC-ethanol injection as an ablative therapy, the present study evaluates the extent to which salient injection parameters govern the injected fluid distribution. METHODS Utilizing ex vivo swine liver, injection parameters (infusion rate, EC%, infusion volume) were examined with fluorescein added to each solution. After injection, tissue samples were frozen, sectioned, and imaged. RESULTS While leakage was higher for ethanol and 3%EC-ethanol at a rate of 10 mL/hr compared to 1 mL/hr, leakage remained low for 6%EC-ethanol regardless of infusion rate. The impact of infusion volume and pressure were also investigated first in tissue-mimicking surrogates and then in tissue. Results indicated that there is a critical infusion pressure beyond which crack formation occurs leading to fluid leakage. At a rate of 10 mL/hr, a volume of 50 μL remained below the critical pressure. CONCLUSIONS Although increasing the infusion rate increases stress on the tissue and the risk of crack formation, injections of 6%EC-ethanol were localized regardless of infusion rate. To further limit leakage, multiple low-volume infusions may be employed. SIGNIFICANCE These results, and the experimental framework developed to obtain them, can inform optimizing EC-ethanol to treat a range of medical conditions.
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28
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Banerjee D, Mandal R, Mandal A, Ghosh I, Mittal S, Muwonge R, Lucas E, Basu P. A Prospective Randomized Trial to Compare Safety, Acceptability and Efficacy of Thermal Ablation and Cryotherapy in a Screen and Treat Setting. Asian Pac J Cancer Prev 2020; 21:1391-1398. [PMID: 32458647 PMCID: PMC7541890 DOI: 10.31557/apjcp.2020.21.5.1391] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 05/11/2020] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND The prospective randomized study aimed to compare the safety, acceptability and efficacy of thermal ablation (TA) to that of cryotherapy in screen and treat setting. METHODS The participants were recruited prospectively in a community-based screening clinic in India. Women positive on visual inspection with acetic acid (VIA) test and/or Human Papillomavirus (HPV) test were assessed for eligibility for ablative treatment. Total 286 eligible women were randomized to receive either cryotherapy (N=150) or TA (N=136) performed by health workers. Colposcopy and cervical biopsy were performed on all, prior to treatment. Post-treatment follow-up was after one year with colposcopy and biopsy. RESULTS Both the treatment methods had high acceptability. Significantly higher proportion of women treated by cryotherapy reported pain compared to women treated by TA, though intensity was mild in vast majority of them. Approximately 30% of women in both arms had histologic abnormalities, mainly CIN 1, and among those who attended follow-up 74.1% and 81.0% didn't have any CIN after cryotherapy and TA respectively. CONCLUSION TA is as acceptable and safe as cryotherapy in screen and treat setting. TA has the logistic advantages for the low-resourced settings as the machines are more portable, do not require costly refrigerant gas and battery-driven models are available. The cure rates for CIN 1+ lesions in our study were comparable between cryotherapy and TA.
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Affiliation(s)
| | - Ranajit Mandal
- Chittaranjan National Cancer Institute, Kolkata, West Bengal, India.
| | - Amit Mandal
- Chittaranjan National Cancer Institute, Kolkata, West Bengal, India.
| | - Ishita Ghosh
- Chittaranjan National Cancer Institute, Kolkata, West Bengal, India.
| | - Srabani Mittal
- Chittaranjan National Cancer Institute, Kolkata, West Bengal, India.
| | | | - Eric Lucas
- International Agency for Research on Cancer, Lyon, France.
| | - Partha Basu
- International Agency for Research on Cancer, Lyon, France.
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Cherniak W, Tyler N, Arora K, Lapidos-Salaiz I, Sczudlo E, Lin A, Barnhart M, Flanigan J, Silkensen S. From potential to practice: how accelerating access to HPV tests and screen and treat programmes can help eliminate cervical cancer. Fam Med Community Health 2020; 7:e000182. [PMID: 32148728 PMCID: PMC6910768 DOI: 10.1136/fmch-2019-000182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 09/13/2019] [Accepted: 09/15/2019] [Indexed: 12/24/2022] Open
Abstract
Human papillomavirus (HPV) vaccination campaigns to prevent cervical cancer are being considered and implemented in countries around the world. While vaccination will protect future generations, it will not help the millions of women currently infected, leading to an estimated 311 000 deaths per year globally. This paper examines a selection of strategies that when applied to both existing and new technologies, could accelerate access to HPV testing. Authors from the US Agency for International Development, the National Institutes of Health, and the Bridge to Health Medical and Dental, a non-governmental organisation, joined forces to propose a scalable and country-directed solution for preventing cervical cancer using an end-to-end approach. Collectively, the authors offer seven evidence-based strategies, that when used alone or in combination have the ability to reduce HPV-caused cervical cancer deaths and disability. These strategies include (1) consistent HPV test intervals to decrease HPV DNA test costs; (2) exploring market shaping opportunities; (3) employing iterative user research methodologies like human-centred design; (4) target product profiles for new HPV tests; (5) encouraging innovation around cervical cancer screen and treat programmes; (6) developing national cancer control plans; and (7) integrating cervical cancer screen and treat services into existing infrastructure. By using the strategies outlined here, in combination with HPV vaccination campaigns, national governments will be able to scale and expand cervical cancer screening programmes and provide evidence-based treatment programmes for HPV-infected women.
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Affiliation(s)
- William Cherniak
- Bridge to Health Medical and Dental, Toronto, Ontario, Canada.,Family and Community Medicine, University of Toronto Faculty of Medicine, Toronto, Ontario, Canada
| | - Nikki Tyler
- Bureau for Global Health, USAID, Washington, DC, USA
| | - Kriti Arora
- Bridge to Health Medical and Dental, Toronto, Ontario, Canada
| | | | - Emma Sczudlo
- Bridge to Health Medical and Dental, Toronto, Ontario, Canada
| | - Amy Lin
- Bureau for Global Health, USAID, Washington, DC, USA
| | | | - John Flanigan
- Center for Global Health, National Cancer Institute, Bethesda, Maryland, USA
| | - Shannon Silkensen
- Center for Global Health, National Cancer Institute, Bethesda, Maryland, USA
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30
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Pinder LF, Parham GP, Basu P, Muwonge R, Lucas E, Nyambe N, Sauvaget C, Mwanahamuntu MH, Sankaranarayanan R, Prendiville W. Thermal ablation versus cryotherapy or loop excision to treat women positive for cervical precancer on visual inspection with acetic acid test: pilot phase of a randomised controlled trial. Lancet Oncol 2020; 21:175-184. [PMID: 31734069 PMCID: PMC6946855 DOI: 10.1016/s1470-2045(19)30635-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/19/2019] [Accepted: 09/19/2019] [Indexed: 02/03/2023]
Abstract
BACKGROUND Cryotherapy is standard practice for treating patients with cervical precancer in see-and-treat programmes in low-income and middle-income countries (LMICs). Because of logistical difficulties with cryotherapy (eg, the necessity, costs, and supply chain difficulties of refrigerant gas; equipment failure; and treatment duration >10 min), a battery-operated thermal ablator that is lightweight and portable has been developed. We aimed to compare thermal ablation using the new device with cryotherapy. METHODS We report the pilot phase of a randomised controlled trial in routine screen-and-treat clinics providing cervical screening using visual inspection with acetic acid (VIA) in Lusaka, Zambia. We recruited non-pregnant women, aged 25 years or older, who were eligible for ablative therapy. We randomly assigned participants (1:1:1) to thermal ablation, cryotherapy, or large loop excision of the transformation zone (LLETZ), using computer-generated allocation. The randomisation was concealed but the nurses providing treatment and the participants were unmasked. Thermal ablation was achieved using the Liger thermal ablator (using 1-5 overlapping applications of the probe heated to 100°C, each application lasting for 40 s), cryotherapy was carried out using the double-freeze technique (freeze for 3 min, thaw for 5 min, and freeze again for 3 min), and LLETZ (using a large loop driven by an electro-surgical unit to excise the transformation zone) was done under local anaesthesia. The primary endpoint was treatment success, defined as either human papillomavirus (HPV) type-specific clearance among participants who were positive for the same HPV type at baseline, or a negative VIA test at 6-month follow-up, if the baseline HPV test was negative. Per protocol analyses were done. Enrolment for the full trial is ongoing. Here, we present findings from a prespecified pilot phase of the full trial. The final analysis of the full trial will assess non-inferiority of the groups for the primary efficacy endpoint. The study is registered with ClinicalTrials.gov, number NCT02956239. FINDINGS Between Aug 2, 2017, and Jan 15, 2019, 750 participants were randomly assigned (250 per group). 206 (84%) participants in the cryotherapy group, 197 (81%) in the thermal ablation group, and 204 (84%) in the LLETZ group attended the 6-month follow-up examination. Treatment success was reported in 120 (60%) of 200 participants in the cryotherapy group, 123 (64%) of 192 in the thermal ablation group, and 134 (67%) of 199 in the LLETZ group (p=0·31). Few participants complained of moderate to severe pain in any group immediately after the procedure (six [2%] of 250 in the cryotherapy group, four [2%] of 250 in the thermal ablation group, and five [2%] of 250 in the LLETZ group) and 2 weeks after the procedure (one [<1%] of 241 in the cryotherapy group, none of 242 in the thermal ablation group, and two [<1%] of 237 in the LLETZ group). None of the participants reported any complication requiring medical consultation or admission to hospital. INTERPRETATION Results from this pilot study preliminarily suggest that thermal ablation has similar treatment success to cryotherapy, without the practical disadvantages of providing cryotherapy in an LMIC. However, the study was not powered to establish the similarity between the techniques, and results from the ongoing randomised controlled trial are need to confirm these results. FUNDING US National Institutes of Health.
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Affiliation(s)
- Leeya F Pinder
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, USA; Obstetrics and Gynecology, University of Zambia, Lusaka, Zambia
| | - Groesbeck P Parham
- Obstetrics and Gynecology, University of Zambia, Lusaka, Zambia; Department of Obstetrics and Gynecology, University of North Carolina, Chapel Hill, NC, USA
| | - Partha Basu
- Screening Group, Early Detection and Prevention Section, International Agency for Research on Cancer, WHO, Lyon, France.
| | - Richard Muwonge
- Screening Group, Early Detection and Prevention Section, International Agency for Research on Cancer, WHO, Lyon, France
| | - Eric Lucas
- Screening Group, Early Detection and Prevention Section, International Agency for Research on Cancer, WHO, Lyon, France
| | | | - Catherine Sauvaget
- Screening Group, Early Detection and Prevention Section, International Agency for Research on Cancer, WHO, Lyon, France
| | - Mulindi H Mwanahamuntu
- Department of Obstetrics and Gynecology, Women and Newborn Hospital, University of Zambia, Lusaka, Zambia
| | - Rengaswamy Sankaranarayanan
- Research Triangle Institute, International-India, Commercial Tower, Pullman Hotel Aerocity, New Delhi, India
| | - Walter Prendiville
- Screening Group, Early Detection and Prevention Section, International Agency for Research on Cancer, WHO, Lyon, France
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Khowal S, Wajid S. Role of Smoking-Mediated molecular events in the genesis of oral cancers. Toxicol Mech Methods 2019; 29:665-685. [DOI: 10.1080/15376516.2019.1646372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Sapna Khowal
- Department of Biotechnology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India
| | - Saima Wajid
- Department of Biotechnology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India
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de Fouw M, Oosting RM, Rutgrink A, Dekkers OM, Peters AAW, Beltman JJ. A systematic review and meta-analysis of thermal coagulation compared with cryotherapy to treat precancerous cervical lesions in low- and middle-income countries. Int J Gynaecol Obstet 2019; 147:4-18. [PMID: 31273785 DOI: 10.1002/ijgo.12904] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 05/09/2019] [Accepted: 07/03/2019] [Indexed: 12/24/2022]
Abstract
BACKGROUND Thermal coagulation is gaining popularity for treating cervical intraepithelial neoplasia (CIN) in screening programs in low- and middle-income countries (LMICs) due to unavailability of cryotherapy. OBJECTIVES Assess the effectiveness of thermal coagulation for treatment of CIN lesions compared with cryotherapy, with a focus on LMICs. SEARCH STRATEGY Papers were identified from previous reviews and electronic literature search in February 2018 with publication date after 2010. SELECTION CRITERIA Publications with original data evaluating cryotherapy or thermal coagulation with proportion of cure as outcome, assessed by colposcopy, biopsy, cytology, and/or visual inspection with acetic acid (VIA), and minimum 6 months follow-up. DATA COLLECTION AND ANALYSIS Pooled proportions of cure are presented stratified per treatment modality, type of lesion, and region. MAIN RESULTS Pooled cure proportions for cryotherapy and thermal coagulation, respectively, were 93.8% (95% CI, 88.5-97.7) and 91.4% (95% CI, 84.9-96.4) for CIN 1; 82.6% (95% CI, 77.4-87.3) and 91.6% (95% CI, 88.2-94.5) for CIN 2-3; and 92.8% (95% CI, 85.6-97.7) and 90.1% (95% CI, 87.0-92.8) for VIA-positive lesions. For thermal coagulation of CIN 2-3 lesions in LMICs 82.4% (95% CI, 75.4-88.6). CONCLUSIONS Both cryotherapy and thermal coagulation are effective treatment modalities for CIN lesions in LMICs.
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Affiliation(s)
- Marlieke de Fouw
- Department of Gynecology and Obstetrics, Leiden University Medical Center, Leiden, Netherlands
| | - Roos Marieke Oosting
- Department of BioMechanical Engineering, Delft University of Technology, Delft, Netherlands
| | - Amy Rutgrink
- Department of Gynecology and Obstetrics, Leiden University Medical Center, Leiden, Netherlands
| | - Olaf Matthijs Dekkers
- Department of Clinical Epidemiology and Endocrinology, Leiden University Medical Center, Leiden, Netherlands
| | | | - Jogchum Jan Beltman
- Department of Gynecology and Obstetrics, Leiden University Medical Center, Leiden, Netherlands
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Cremer M, Alfaro K, Garai J, Salinas M, Maza M, Zevallos A, Taxa L, Diaz AC, Castle P, Alonzo TA, Masch R, Soler M, Conzuelo-Rodriguez G, Gage JC, Felix JC. Evaluation of two alternative ablation treatments for cervical pre-cancer against standard gas-based cryotherapy: a randomized non-inferiority study. Int J Gynecol Cancer 2019; 29:ijgc-2018-000148. [PMID: 31055452 PMCID: PMC9884482 DOI: 10.1136/ijgc-2018-000148] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/20/2019] [Accepted: 04/08/2019] [Indexed: 01/31/2023] Open
Abstract
INTRODUCTION Gas-based cryotherapy is the conventional ablative treatment for cervical pre-cancer in low-income settings, but the use of gas poses significant challenges. We compared the depth of necrosis induced by gas-based cryotherapy with two gas-free alternatives: cryotherapy using CryoPen,and thermoablation. METHODS We conducted a five-arm randomized non-inferiority trial: double-freeze carbon dioxide (CO2) cryotherapy (referent), single-freeze CO2 cryotherapy, double-freeze CryoPen, single-freeze CryoPen, and thermoablation. Subjects were 130 women scheduled for hysterectomy for indications other than cervical pathology, and thus with healthy cervical tissue available for histological evaluation of depth of necrosis post-surgery. The null hypothesis was rejected (ie, conclude non-inferiority) if the upper bound of the 90% confidence interval (90% CI) for the difference in mean depth of necrosis (referent minus each experimental method) was <1.14 mm. Patient pain during treatment was reported on a scale of 0 (no pain) to 10 (worst pain). RESULTS A total of 133 patients were enrolled in the study. The slides from three women were deemed unreadable. One patient was excluded because her hysterectomy was postponed for reasons unrelated to the study, and two patients were excluded because treatment application did not follow the established protocol. For the remaining 127 women, mean depth of necrosis for double-freeze CO2 (referent) was 6.0±1.6 mm. Differences between this and other methods were: single-freeze CO2 = 0.4 mm (90% CI -0.4 to 1.2 mm), double-freeze CryoPen= 0.7 mm (90% CI 0.04 to 1.4 mm), single-freeze CryoPen= 0.5 mm (90% CI -0.2 to 1.2 mm), and thermoablation = 2.6 mm (90% CI 2.0 to 3.1 mm). Mean pain levels were 2.2±1.0 (double-freeze CO2 cryotherapy), 1.8±0.8 (single-freeze CO2 cryotherapy), 2.5±1.4 (double-freeze CryoPen), 2.6±1.4 (single-freeze CryoPen), and 4.1±2.3 (thermoablation). DISCUSSION Compared with the referent, non-inferiority could not be concluded for other methods. Mean pain scores were low for all treatments. Depth of necrosis is a surrogate for treatment efficacy, but a randomized clinical trial is necessary to establish true cure rates.
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Affiliation(s)
- Miriam Cremer
- OB/GYN and Women's Health Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Basic Health International, San Salvador, El Salvador
- Basic Health International, New York City, New York, USA
| | - Karla Alfaro
- Basic Health International, San Salvador, El Salvador
| | - Jillian Garai
- Basic Health International, New York City, New York, USA
| | - Manuel Salinas
- Instituto Salvadoreño del Seguro Social, San Salvador, El Salvador
| | - Mauricio Maza
- Basic Health International, San Salvador, El Salvador
| | | | - Luis Taxa
- Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru
| | - Ana C Diaz
- Instituto Salvadoreño del Seguro Social, San Salvador, El Salvador
| | - Philip Castle
- Yeshiva University Albert Einstein College of Medicine, Bronx, New York, USA
| | - Todd A Alonzo
- University of Southern California, Los Angeles, California, USA
| | - Rachel Masch
- Basic Health International, New York City, New York, USA
| | - Montserrat Soler
- OB/GYN and Women's Health Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Basic Health International, New York City, New York, USA
| | | | - Julia C Gage
- National Cancer Institute, Bethesda, Maryland, USA
| | - Juan C Felix
- Medical College of Wisconsin, Milwaukee, Wisconsin, USA
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Randall TC, Sauvaget C, Muwonge R, Trimble EL, Jeronimo J. Worthy of further consideration: An updated meta-analysis to address the feasibility, acceptability, safety and efficacy of thermal ablation in the treatment of cervical cancer precursor lesions. Prev Med 2019; 118:81-91. [PMID: 30342109 DOI: 10.1016/j.ypmed.2018.10.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 10/02/2018] [Accepted: 10/08/2018] [Indexed: 11/17/2022]
Abstract
Treatment of preinvasive lesions is critical to the success of secondary prevention of cervical cancer. In many settings, however, excision or ablation of preinvasive lesions can prove challenging. Thermal ablation (TA) is a form of treatment for cervical precancer that may present fewer logistical challenges in resource limited settings. In 2013, Dolman and colleagues wrote a meta-analysis of publications reporting cure rates from TA. This included only one article from a low or middle-income country (LMIC). We updated Dolman's meta-analysis to include more recent articles from LMICs. A formal review of the world literature was performed for the years 2014-2017. Article titles and abstracts were reviewed for relevance; full articles were assessed for quality. The primary endpoint was treatment outcome for cervical intraepithelial neoplasia grade 2 or higher (CIN2+). The I2 statistic was used to assess heterogeneity between studies. Studies were stratified by geographic region, decade that the study was published, World Bank economic classification of the country where the study was performed, and other factors. We reviewed 34 total reports and included 23 in our meta-analysis, including 10,995 and 6371 patients, respectively. A total of 7 studies were performed in LMICs, including 6 studies included in the meta-analysis. The overall response rate for TA treatment of biopsy proven CIN2+ was 93.8%. Consistent with the wide variety of settings and patient populations, there was significant heterogeneity between studies. TA appears to be an effective treatment for CIN2+ across a variety of settings, including in LMICs.
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Affiliation(s)
- Thomas C Randall
- Gynecologic Oncology, The Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
| | - Catherine Sauvaget
- Screening Group, Early Detection and Prevention Section, International Agency for Research on Cancer, Lyon, France
| | - Richard Muwonge
- Screening Group, Early Detection and Prevention Section, International Agency for Research on Cancer, Lyon, France
| | - Edward L Trimble
- Global HPV and Cervical Cancer Research and Control, National Cancer Institute, Rockville, MD, USA
| | - Jose Jeronimo
- Global Coalition Against Cervical Cancer, Seattle, WA, USA
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Cremer ML, Conzuelo-Rodriguez G, Cherniak W, Randall T. Ablative Therapies for Cervical Intraepithelial Neoplasia in Low-Resource Settings: Findings and Key Questions. J Glob Oncol 2018; 4:1-10. [PMID: 30372399 PMCID: PMC7010451 DOI: 10.1200/jgo.18.00093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Barriers to access for cervical precancer care in low-resource settings go beyond cost. Gas-based cryotherapy has emerged as the standard treatment in these areas, but there are barriers to this technology that have necessitated the development and implementation of affordable and portable alternatives. This review identifies knowledge gaps with regard to technologies primarily used in low-resource settings, including standard cryotherapy, nongas-based cryotherapy, and thermoablation. These gaps are addressed using evidence-based guidelines, patient and provider acceptability, long-term obstetric outcomes, and treatment of women with HIV infection. This review highlights the need for prospective studies that compare ablative methods, especially given the increasing use of thermoablation.
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Affiliation(s)
- Miriam L. Cremer
- Miriam L. Cremer, Cleveland Clinic, Cleveland, OH; Gabriel Conzuelo-Rodriguez, Basic Health International, New York, NY; William Cherniak, Bridge to Health Medical and Dental, Toronto, Ontario, Canada; and Thomas Randall, Massachusetts General Hospital, Boston, MA
| | - Gabriel Conzuelo-Rodriguez
- Miriam L. Cremer, Cleveland Clinic, Cleveland, OH; Gabriel Conzuelo-Rodriguez, Basic Health International, New York, NY; William Cherniak, Bridge to Health Medical and Dental, Toronto, Ontario, Canada; and Thomas Randall, Massachusetts General Hospital, Boston, MA
| | - William Cherniak
- Miriam L. Cremer, Cleveland Clinic, Cleveland, OH; Gabriel Conzuelo-Rodriguez, Basic Health International, New York, NY; William Cherniak, Bridge to Health Medical and Dental, Toronto, Ontario, Canada; and Thomas Randall, Massachusetts General Hospital, Boston, MA
| | - Thomas Randall
- Miriam L. Cremer, Cleveland Clinic, Cleveland, OH; Gabriel Conzuelo-Rodriguez, Basic Health International, New York, NY; William Cherniak, Bridge to Health Medical and Dental, Toronto, Ontario, Canada; and Thomas Randall, Massachusetts General Hospital, Boston, MA
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36
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Vu M, Yu J, Awolude OA, Chuang L. Cervical cancer worldwide. Curr Probl Cancer 2018; 42:457-465. [DOI: 10.1016/j.currproblcancer.2018.06.003] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 05/18/2018] [Accepted: 06/05/2018] [Indexed: 10/28/2022]
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Up-regulation of inflammation-related LncRNA-IL7R predicts poor clinical outcome in patients with cervical cancer. Biosci Rep 2018; 38:BSR20180483. [PMID: 29720427 PMCID: PMC5997790 DOI: 10.1042/bsr20180483] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 04/24/2018] [Accepted: 05/02/2018] [Indexed: 12/16/2022] Open
Abstract
The long-term chronic inflammation of cervical intraepithelial neoplasia (CIN) induces the initiation and progression of cervical cancer. Long non-coding RNAs (LncRNAs) are being identified to be involved into inflammation and carcinogenesis and could function as cancer biomarkers in clinical. However, the significance of inflammation-related LncRNA (e.g. LncRNA-IL7R) in cervical cancer is limited. We, here, investigated the clinical role of inflammation-related LncRNA-IL7R (Lnc-IL7R) in healthy cervical tissue (n=15), CIN 1/2/3 (n=35), cervical cancer (n=70), and clarified its function via knockdown in vitro and in vivo. The results showed that the expression of Lnc-IL7R was increased from normal tissues to neoplastic lesions and cervical cancer. Up-regulated Lnc-IL7R positively correlated to tumor size, International Federation of Gynaecology and Obstetrics (FIGO) stage, and lymph node metastasis (LNM). Patients with high expression of Lnc-IL7R had poor prognosis with short overall survival (OS) time, and Cox regression analysis revealed that Lnc-IL7R could be independent prognostic factor for cervical cancer. Moreover, knockdown of Lnc-IL7R by two different siRNAs in cervical cancer cell lines Hela and SiHa induced impaired cell vitality and caspase-3-dependent apoptosis in vitro. Furthermore, inhibition of Lnc-IL7R in vivo significantly restricted the tumor growth with decreased expressions of proliferation index Ki-67 and Lnc-IL7R. These data indicated that Lnc-IL7R predicts a poor clinical outcome of cervical cancer patients, and knockdown of Lnc-IL7R is amenable to the treatment of cervical cancer.
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Basu P, Taghavi K, Hu SY, Mogri S, Joshi S. Management of cervical premalignant lesions. Curr Probl Cancer 2018; 42:129-136. [PMID: 29428790 DOI: 10.1016/j.currproblcancer.2018.01.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 12/27/2017] [Accepted: 01/10/2018] [Indexed: 01/08/2023]
Abstract
Treatment of cervical premalignant lesions (cervical intraepithelial neoplasia; CIN) of different grades is very effective, simple, and safe. The entire transformation zone of the cervix needs to be treated either by an ablative technique (cryotherapy or thermal ablation) or an excisional technique (large loop excision of transformation zone or cold knife conization); the choice of treatment depends on the size and location of the lesion and the type of the transformation zone. The cure rate after ablative treatment of high-grade CIN may be little lower than that after excisional treatment. The simplicity of the technique, low complication rate, and lesser cost make ablative technique the treatment of choice in the low resourced settings for the eligible lesions. In situations where organizing colposcopy and histopathology services is challenging, simple algorithms like screening with visual inspection with acetic acid test and immediate ablative treatment of the visual inspection with acetic acid-positive women has been recommended by the World Health Organization. Such a strategy is effective in preventing subsequent development of high-grade CIN and also ensures high compliance of the screen positive women to treatment.
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Affiliation(s)
- Partha Basu
- Screening Group, Early Detection and Prevention Section, International Agency for Research on Cancer, Lyon, France.
| | - Katayoun Taghavi
- Institute of Social and Preventative medicine, University of Bern, Bern, Switzerland
| | - Shang-Ying Hu
- National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Sushma Mogri
- Department of Obstetrics and Gynecology, American International Institute of Medical Sciences, Udaipur, India
| | - Smita Joshi
- Jehangir Clinical Development Centre, Jehangir Hospital Premises and Prayas, Pune, India
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Lopez MS, Baker ES, Maza M, Fontes-Cintra G, Lopez A, Carvajal JM, Nozar F, Fiol V, Schmeler KM. Cervical cancer prevention and treatment in Latin America. J Surg Oncol 2017; 115:615-618. [PMID: 28168717 DOI: 10.1002/jso.24544] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Accepted: 12/27/2016] [Indexed: 12/31/2022]
Abstract
Cervical cancer is a preventable disease with a known etiology (human papillomavirus), effective preventive vaccines, excellent screening methods, and a treatable pre-invasive phase. Surgery is the primary treatment for pre-invasive and early-stage disease and can safely be performed in many low-resource settings. However, cervical cancer rates remain high in many areas of Latin America. This article presents a number of evidence-based strategies being implemented to improve cervical cancer outcomes in Latin America.
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Affiliation(s)
- Melissa S Lopez
- The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Ellen S Baker
- The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mauricio Maza
- Basic Health International (BHI), San Salvador, El Salvador
| | | | - Aldo Lopez
- Instituto Nacional de Enfermedades Neoplásicas (INEN), Lima, Peru
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