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Kayamba V, Mubbunu M, Kelly P. Endoscopic diagnosis of gastric and oesophageal cancer in Lusaka, Zambia: a retrospective analysis. BMC Gastroenterol 2024; 24:122. [PMID: 38561688 PMCID: PMC10983744 DOI: 10.1186/s12876-024-03187-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 02/23/2024] [Indexed: 04/04/2024] Open
Abstract
INTRODUCTION There are uncertainties surrounding the spectrum of upper gastrointestinal (UGI) diseases in sub-Saharan Africa. This is mainly due to the limitations of data collection and recording. We previously reported an audit of UGI endoscopic diagnoses in Zambia spanning from 1977 to 2014. We now have extended this analysis to include subsequent years, in order to provide a more comprehensive picture of how the diagnoses have evolved over 4 decades. METHODS We combined data collected from the endoscopy unit at the University Teaching Hospital (UTH) in Lusaka during a previous review with that collected from the beginning of 2015 to the end of 2021. Since 2015, an electronic data base of endoscopy reports at the UTH was kept. The electronic data base was composed of drop-down menus that allowed for standardised reporting of findings. Collected data were coded by two experienced endoscopists and analysed. RESULTS In total, the analysis included 25,849 endoscopic records covering 43 years. The number of endoscopic procedures performed per year increased drastically in 2010. With the exception of the last 2 years, the proportion of normal endoscopies also increased during the time under review. In total, the number of gastric cancer (GC) cases was 658 (3%) while that of oesophageal cancer (OC) was 1168 (5%). The number of GC and OC diagnoses increased significantly over the period under review, (p < 0.001 for both). For OC the increase remained significant when analysed as a percentage of all procedures performed (p < 0.001). Gastric ulcers (GU) were diagnosed in 2095 (8%) cases, duodenal ulcers (DU) in 2276 (9%) cases and 239 (1%) had both ulcer types. DU diagnosis showed a significantly decreasing trend over each decade (p < 0.001) while GU followed an increasing trend (p < 0.001). CONCLUSIONS UGI endoscopic findings in Lusaka, Zambia, have evolved over the past four decades with a significant increase of OC and GU diagnoses. Reasons for these observations are yet to be established.
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Affiliation(s)
- Violet Kayamba
- Tropical Gastroenterology and Nutrition Group, University of Zambia School of Medicine, Nationalist Road, PO Box 50398, Lusaka, Zambia.
| | - Malambo Mubbunu
- Tropical Gastroenterology and Nutrition Group, University of Zambia School of Medicine, Nationalist Road, PO Box 50398, Lusaka, Zambia
| | - Paul Kelly
- Tropical Gastroenterology and Nutrition Group, University of Zambia School of Medicine, Nationalist Road, PO Box 50398, Lusaka, Zambia
- Blizard Institute, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, E1 2AT, London, UK
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2
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Torabi J, Abeshouse M, Giibwa A, Okello Damoi J, Binoga Bakaleke M, Waye JD, Glerum K, Marin ML, Zhang L. Remote training and teleproctoring in gastrointestinal endoscopy for practicing surgeon in rural Uganda. Surg Endosc 2023; 37:8785-8790. [PMID: 37580579 DOI: 10.1007/s00464-023-10338-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 07/19/2023] [Indexed: 08/16/2023]
Abstract
BACKGROUND There is a significant, unmet need for endoscopy services in rural Uganda. With limited diagnostic and therapeutic interventions, patients in these communities often present with advanced disease. Practicing surgeons must continually adapt to new techniques to meet the needs of their patient populations. Here, we present a remotely proctored endoscopy training program for a surgeon practicing in an area devoid of endoscopic capabilities. METHODS This was a retrospective case series conducted between February 2020 and December 2022 at Kyabirwa Surgical Center (KSC). After a 1-week in-person training camp, one surgeon performed endoscopy under guidance of a remote proctor. Patient data and outcomes were collected retrospectively. RESULTS The previously endoscopic naïve practicing Ugandan surgeon was remotely proctored for 139 endoscopic cases and he subsequently independently performed 167 diagnostic colonoscopies and 425 upper endoscopies. Therapeutic endoscopy was conducted under remote guidance after proficiency in diagnostic endoscopy. A total of 43 therapeutic procedures were performed, including 29 esophageal stent placements, 5 variceal bandings, and 9 foreign body retrievals. All procedures were completed without complication. CONCLUSION Our center developed a remotely proctored endoscopy program that allowed for training of practicing surgeons in an area lacking endoscopic services. Despite its limitations, remotely proctored endoscopy serves as a unique but highly valuable method of expanding access to endoscopy, particularly in areas that lack adequate training opportunities.
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Affiliation(s)
- Julia Torabi
- Department of Surgery, The Mount Sinai Hospital, 1 Gustav Levy Pl, New York, NY, 10019, USA.
| | - Marnie Abeshouse
- Department of Surgery, The Mount Sinai Hospital, 1 Gustav Levy Pl, New York, NY, 10019, USA
| | | | | | | | - Jerome D Waye
- Department of Surgery, The Mount Sinai Hospital, 1 Gustav Levy Pl, New York, NY, 10019, USA
| | - Katie Glerum
- Department of Surgery, The Mount Sinai Hospital, 1 Gustav Levy Pl, New York, NY, 10019, USA
| | - Michael L Marin
- Department of Surgery, The Mount Sinai Hospital, 1 Gustav Levy Pl, New York, NY, 10019, USA
| | - Linda Zhang
- Department of Surgery, The Mount Sinai Hospital, 1 Gustav Levy Pl, New York, NY, 10019, USA
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3
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Yahya H. Change in Prevalence and Pattern of Peptic Ulcer Disease in the Northern Savannah of Nigeria: An Endoscopic Study. Ann Afr Med 2023; 22:420-425. [PMID: 38358140 PMCID: PMC10775940 DOI: 10.4103/aam.aam_144_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 01/04/2023] [Indexed: 02/16/2024] Open
Abstract
Background Peptic ulcer disease (PUD) is common worldwide. Its incidence and prevalence have been declining in recent years in developed countries, and a similar trend has been observed in many parts of Africa including Nigeria. Aim This study aimed to provide an endoscopic update on PUD in the Northern Savannah of Nigeria and compare with past reports from the region and recent reports from Nigeria, Africa, and the rest of the world. Methods Upper gastrointestinal endoscopy records of consecutive patients diagnosed with PUD between January 2014 and September 2022 at an endoscopy unit of a tertiary institution in North-West Nigeria were retrieved and demographic data, types of peptic ulcer, and their characteristics were extracted and analyzed. Results Over a 9-year period, 171/1958 (8.7%) patients were diagnosed with PUD: mean age 48.8 years (range 14-85), 68.4% male, and 70% >40 years. 59.6% were gastric ulcers (GU), 31.6% duodenal ulcers (DU), and 8.8% were both. The mean age of patients with GU was slightly higher than those with DU (49.9 years vs. 46.6 years, P = 0.29); patients aged <40 years were significantly more likely to be diagnosed with DU than GU (54.7% vs. 33.9%, P = 0.016) while those >40 years significantly more GU than DU (74.6% vs. 54.7%, P = 0.016). There were no significant gender differences between GU and DU. Conclusion The prevalence and pattern of PUD in Northern Savannah of Nigeria have changed - patients were predominantly male and older, and GU predominated.
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Affiliation(s)
- Husain Yahya
- Department of Internal Medicine, Barau Dikko Teaching Hospital, Kaduna State University, Kaduna, Nigeria
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Shumba S, Kayamba V. Analysis of the proportion of university teaching hospital gastric cancer data included in the Zambia national cancer registry. Afr Health Sci 2023; 23:438-443. [PMID: 37545961 PMCID: PMC10398468 DOI: 10.4314/ahs.v23i1.46] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023] Open
Abstract
BACKGROUND The exact prevalence of gastric cancer in Zambia is unknown. The aim of this study was to determine the proportion of gastric cancer cases seen at the largest hospital in Zambia, whose records were included in the Zambia National Cancer Registry (ZNCR). METHODS We reviewed gastric cancer records between January 2015 and December 2017 from the University Teaching Hospital, Cancer Diseases Hospital and ZNCR. Statistical analysis was done using Stata version 15. RESULTS We reviewed 94 patient records (42 were females) with a mean age of 59 years (standard deviation, 14.9). Histologically, the majority of the cases were adenocarcinoma (84%). Of the reviewed records, only 39/94 (42%) had their data included in the ZNCR. Median time to from endoscopic diagnosis to histopathological confirmation was 11 days (inter-quartile range; 7-20). Median time from histological confirmation to the Cancer Diseases Hospital for therapy was 8 days (IQR 2-19). Overall median survival time for gastric cancer patients was 290 days (CI 95%, 112 - 1225). CONCLUSIONS Data on gastric cancer reported in the ZNCR are an underestimate of the true disease burden and there is need to strengthen data collection strategies for gastric cancer in Zambia.
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Affiliation(s)
- Samson Shumba
- University of Zambia School of Public Health, Department of Epidemiology and Biostatistics, Lusaka, Zambia
| | - Violet Kayamba
- Tropical Gastroenterology and Nutrition Group, University of Zambia School of Medicine, PO Box 50398, Lusaka, Zambia
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Jemilohun AC, Akande KO, Ngubor TD, Oku O, Ogunmola MI, Adesuyi YO. Endoscopic Findings in Patients With Upper Gastrointestinal Bleeding in Ogun State, Nigeria. Cureus 2022; 14:e23637. [PMID: 35510020 PMCID: PMC9057311 DOI: 10.7759/cureus.23637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2022] [Indexed: 11/08/2022] Open
Abstract
Introduction Although the global incidence of upper gastrointestinal bleeding (UGIB) appears to have reduced substantially in the past few decades, acute UGIB still carries significant morbidity and mortality worldwide. There are currently no published data on UGIB in Ogun State, Nigeria. This study examined the endoscopic findings in patients with UGIB in Ogun State. Methodology The study was a retrospective cross-sectional survey of patients with UGIB who had upper gastrointestinal endoscopy at three endoscopy centers in Ogun State, Southwest Nigeria, from January 2015 to December 2021. Patients’ data, which included age, gender, and endoscopic findings, were extracted from the endoscopy registers into a spreadsheet and analyzed statistically. Summary statistics included means ± standard deviation for continuous variables and frequencies and percentages for categorical variables. Categorical variables were compared for differences by chi-square test or Fisher’s exact test as appropriate. The statistical significance cutoff was p-value <0.05. Results A total of 171 had endoscopy for UGIB during the period under review but 168 had complete data. Out of the 168, 113 (67.3%) were males, giving a male-to-female ratio of 2:1. The mean age of the patients was 52.4 ± 18.1 years, with an age range of 7-85 years. The modal age group was ≥60 years (75; 39.9%). The most common endoscopic finding was peptic ulcer disease (77; 45.8%), followed by esophagogastric varices (27; 16.1%), erosive mucosal disease (25; 14.9 %), portal hypertensive gastropathy (15; 8.9%), suspected malignancies (11; 6.6%), hemorrhagic gastritis (7; 4.2%), gastric antral vascular ectasia (2; 1.2%), and Mallory-Weiss tear (1; 0.6%), respectively. Forty-four patients (26.2%) had no lesion that could explain UGIB. Conclusion Peptic ulcer disease was the most common cause of UGIB among our patient population, and the elderly male patients were the most affected.
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Buckle GC, Mmbaga EJ, Paciorek A, Akoko L, Deardorff K, Mgisha W, Mushi BP, Mwaiselage J, Hiatt RA, Zhang L, Van Loon K. Risk Factors Associated With Early-Onset Esophageal Cancer in Tanzania. JCO Glob Oncol 2022; 8:e2100256. [PMID: 35113655 PMCID: PMC8853620 DOI: 10.1200/go.21.00256] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Eastern Africa is one of several regions affected by high incidence rates of esophageal squamous cell carcinoma (ESCC). A unique epidemiologic feature of ESCC in Eastern Africa is the high incidence in young people, with one-third of cases diagnosed at age < 45 years. This study aimed to investigate risk factors for early-onset ESCC in Tanzania through a secondary analysis of a matched case-control study. Data from Tanzania show esophageal cancer risk factors in East Africa may differ across age groups.![]()
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Affiliation(s)
- Geoffrey C Buckle
- Division of Hematology/Oncology, Department of Medicine, University of California, San Francisco (UCSF), San Francisco, CA.,UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA
| | - Elia J Mmbaga
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Alan Paciorek
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA.,Department of Epidemiology and Biostatistics, UCSF, San Francisco, CA
| | - Larry Akoko
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Katrina Deardorff
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA
| | - William Mgisha
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Beatrice P Mushi
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | | | - Robert A Hiatt
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA.,Department of Epidemiology and Biostatistics, UCSF, San Francisco, CA
| | - Li Zhang
- Division of Hematology/Oncology, Department of Medicine, University of California, San Francisco (UCSF), San Francisco, CA.,UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA.,Department of Epidemiology and Biostatistics, UCSF, San Francisco, CA
| | - Katherine Van Loon
- Division of Hematology/Oncology, Department of Medicine, University of California, San Francisco (UCSF), San Francisco, CA.,UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA
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7
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Mwachiro M, Topazian HM, Kayamba V, Mulima G, Ogutu E, Erkie M, Lenga G, Mutie T, Mukhwana E, Desalegn H, Berhe R, Meshesha BR, Kaimila B, Kelly P, Fleischer D, Dawsey SM, Topazian MD. Gastrointestinal endoscopy capacity in Eastern Africa. Endosc Int Open 2021; 9:E1827-E1836. [PMID: 34790551 PMCID: PMC8589549 DOI: 10.1055/a-1551-3343] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 07/09/2021] [Indexed: 02/07/2023] Open
Abstract
Background and study aims Limited evidence suggests that endoscopy capacity in sub-Saharan Africa is insufficient to meet the levels of gastrointestinal disease. We aimed to quantify the human and material resources for endoscopy services in eastern African countries, and to identify barriers to expanding endoscopy capacity. Patients and methods In partnership with national professional societies, digestive healthcare professionals in participating countries were invited to complete an online survey between August 2018 and August 2020. Results Of 344 digestive healthcare professionals in Ethiopia, Kenya, Malawi, and Zambia, 87 (25.3 %) completed the survey, reporting data for 91 healthcare facilities and identifying 20 additional facilities. Most respondents (73.6 %) perform endoscopy and 59.8 % perform at least one therapeutic modality. Facilities have a median of two functioning gastroscopes and one functioning colonoscope each. Overall endoscopy capacity, adjusted for non-response and additional facilities, includes 0.12 endoscopists, 0.12 gastroscopes, and 0.09 colonoscopes per 100,000 population in the participating countries. Adjusted maximum upper gastrointestinal and lower gastrointestinal endoscopic capacity were 106 and 45 procedures per 100,000 persons per year, respectively. These values are 1 % to 10 % of those reported from resource-rich countries. Most respondents identified a lack of endoscopic equipment, lack of trained endoscopists and costs as barriers to provision of endoscopy services. Conclusions Endoscopy capacity is severely limited in eastern sub-Saharan Africa, despite a high burden of gastrointestinal disease. Expanding capacity requires investment in additional human and material resources, and technological innovations that improve the cost and sustainability of endoscopic services.
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Affiliation(s)
- Michael Mwachiro
- Department of Endoscopy and Surgery, Tenwek Hospital, Bomet, Kenya
| | - Hillary M. Topazian
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States
| | | | | | - Elly Ogutu
- Department of Clinical Medicine & Therapeutics, University of Nairobi, Kenya
- World Gastroenterology Organization Training Centre, Nairobi, Kenya
| | - Mengistu Erkie
- Division of Gastroenterology & Hepatology, Department of Internal Medicine, Addis Ababa University, College of Health Sciences, Ethiopia
| | - Gome Lenga
- Department of Medical Services, Kenya Ports Authority
| | - Thomas Mutie
- World Gastroenterology Organization Training Centre, Nairobi, Kenya
- Department of Gastroenterology, Nairobi Hospital
| | - Eva Mukhwana
- World Gastroenterology Organization Training Centre, Nairobi, Kenya
| | - Hailemichael Desalegn
- Division of Gastroenterology and Hepatology, St. Paul’s Hospital Millennium Medical College, Addis Ababa, Ethiopia
| | - Rezene Berhe
- Division of Gastroenterology & Hepatology, Department of Internal Medicine, Addis Ababa University, College of Health Sciences, Ethiopia
| | - Berhane Redae Meshesha
- Department of Surgery, Saint Paul’s Hospital Millennium Medical College, Addis Ababa, Ethiopia
| | | | - Paul Kelly
- University of Zambia School of Medicine, Lusaka, Zambia
| | - David Fleischer
- Division of Gastroenterology and Hepatology, Mayo Clinic, Phoenix, Arizona
| | - Sanford M. Dawsey
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, United States
| | - Mark D. Topazian
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States
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8
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Roberts I, Shakur-Still H, Afolabi A, Akere A, Arribas M, Austin E, Bal K, Bazeer N, Beaumont D, Brenner A, Carrington L, Chaudhri R, Coats T, Gilmore I, Halligan K, Hussain I, Jairath V, Javaid K, Kayani A, Lisman T, Mansukhani R, Miners A, Mutti M, Nadeem MA, Pollok R, Prowse D, Simmons J, Stanworth S, Veitch A, Williams J. A high-dose 24-hour tranexamic acid infusion for the treatment of significant gastrointestinal bleeding: HALT-IT RCT. Health Technol Assess 2021; 25:1-86. [PMID: 34663491 DOI: 10.3310/hta25580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Tranexamic acid reduces blood loss in surgery and the risk of death in trauma patients. Meta-analyses of small trials suggest that tranexamic acid decreases the number of deaths from gastrointestinal bleeding, but these meta-analyses are prone to selection bias. OBJECTIVE The trial provides reliable evidence of the effect of tranexamic acid on mortality, rebleeding and complications in significant acute gastrointestinal bleeding. DESIGN A multicentre, randomised, placebo-controlled trial and economic analysis. Patients were assigned by selecting one treatment pack from a box of eight, which were identical apart from the pack number. Patients, caregivers and outcome assessors were masked to allocation. The main analyses were by intention to treat. SETTING The setting was 164 hospitals in 15 countries, co-ordinated from the London School of Hygiene & Tropical Medicine. PARTICIPANTS Adults with significant upper or lower gastrointestinal bleeding (n = 12,009) were eligible if the responsible clinician was substantially uncertain about whether or not to use tranexamic acid. The clinical diagnosis of significant bleeding implied a risk of bleeding to death, including hypotension, tachycardia or signs of shock, or urgent transfusion, endoscopy or surgery. INTERVENTION Tranexamic acid (a 1-g loading dose over 10 minutes, then a 3-g maintenance dose over 24 hours) or matching placebo. MAIN OUTCOME MEASURES The primary outcome was death due to bleeding within 5 days of randomisation. Secondary outcomes were all-cause and cause-specific mortality; rebleeding; need for endoscopy, surgery or radiological intervention; blood product transfusion; complications; disability; and days spent in intensive care or a high-dependency unit. RESULTS A total of 12,009 patients were allocated to receive tranexamic acid (n = 5994, 49.9%) or the matching placebo (n = 6015, 50.1%), of whom 11,952 (99.5%) received the first dose. Death due to bleeding within 5 days of randomisation occurred in 222 (3.7%) patients in the tranexamic acid group and in 226 (3.8%) patients in the placebo group (risk ratio 0.99, 95% confidence interval 0.82 to 1.18). Thromboembolic events occurred in 86 (1.4%) patients in the tranexamic acid group and 72 (1.2%) patients in the placebo group (risk ratio 1.20, 95% confidence interval 0.88 to 1.64). The risk of arterial thromboembolic events (myocardial infarction or stroke) was similar in both groups (0.7% in the tranexamic acid group vs. 0.8% in the placebo group; risk ratio 0.92, 95% confidence interval 0.60 to 1.39), but the risk of venous thromboembolic events (deep-vein thrombosis or pulmonary embolism) was higher in tranexamic acid-treated patients than in placebo-treated patients (0.8% vs. 0.4%; risk ratio 1.85, 95% confidence interval 1.15 to 2.98). Seizures occurred in 38 patients who received tranexamic acid and in 22 patients who received placebo (0.6% vs. 0.4%, respectively; risk ratio 1.73, 95% confidence interval 1.03 to 2.93). In the base-case economic analysis, tranexamic acid was not cost-effective and resulted in slightly poorer health outcomes than no tranexamic acid. CONCLUSIONS Tranexamic acid did not reduce death from gastrointestinal bleeding and, although inexpensive, it is not cost-effective in adults with acute gastrointestinal bleeding. FUTURE WORK These results caution against a uniform approach to the management of patients with major haemorrhage and highlight the need for randomised trials targeted at specific pathophysiological processes. LIMITATIONS Although this is one of the largest randomised trials in gastrointestinal bleeding, we cannot rule out a modest increase or decrease in death due to bleeding with tranexamic acid. TRIAL REGISTRATION Current Controlled Trials ISRCTN11225767, ClinicalTrials.gov NCT01658124 and EudraCT 2012-003192-19. FUNDING This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 25, No. 58. See the NIHR Journals Library website for further project information.
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Affiliation(s)
- Ian Roberts
- Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, UK
| | | | - Adefemi Afolabi
- Department of Surgery, University College Hospital Ibadan, Ibadan, Nigeria
| | - Adegboyega Akere
- Department of Medicine, University College Hospital Ibadan, Ibadan, Nigeria
| | - Monica Arribas
- Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, UK
| | - Emma Austin
- Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, UK
| | - Kiran Bal
- Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, UK
| | - Nuha Bazeer
- Department of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, UK.,Department of Health Policy, London School of Economics and Political Science, London, UK
| | - Danielle Beaumont
- Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, UK
| | - Amy Brenner
- Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, UK
| | - Laura Carrington
- Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, UK
| | - Rizwana Chaudhri
- Department of Obstetrics and Gynaecology, Rawalpindi Medical University, Rawalpindi, Pakistan
| | - Timothy Coats
- Emergency Department, Leicester Royal Infirmary, Leicester, UK
| | - Ian Gilmore
- Liverpool Centre for Alcohol Research, University of Liverpool, Liverpool, UK
| | | | - Irshad Hussain
- Department of Medicine, King Edward Medical University, Mayo Hospital, Lahore, Pakistan
| | - Vipul Jairath
- Division of Gastroenterology, Western University and London Health Sciences Centre, London, ON, Canada
| | - Kiran Javaid
- Rawalpindi Medical University - Pakistan National Coordinating Centre (RMU-PNCC), Rawalpindi, Pakistan
| | - Aasia Kayani
- Rawalpindi Medical University - Pakistan National Coordinating Centre (RMU-PNCC), Rawalpindi, Pakistan
| | - Ton Lisman
- Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Raoul Mansukhani
- Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, UK
| | - Alec Miners
- Department of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, UK
| | - Muttiullah Mutti
- Department of Medicine, Rawalpindi Medical University, Rawalpindi, Pakistan
| | - Muhammad Arif Nadeem
- Medical Unit III, Services Institute of Medical Sciences, Services Hospital Gastrointestinal, Lahore, Pakistan
| | - Richard Pollok
- Gastroenterology and Hepatology Department, St George's Hospital, London, UK
| | - Danielle Prowse
- Clinical Trials Unit, London School of Hygiene & Tropical Medicine, London, UK
| | - Jonathan Simmons
- Gastroenterology Department, Royal Berkshire Hospital, Reading, UK
| | - Simon Stanworth
- Transfusion Medicine, NHS Blood and Transplant (NHSBT), John Radcliffe Hospital, Oxford, UK.,Department of Haematology, Oxford University Hospitals NHS Foundation Trust, Churchill Hospital, Oxford, UK.,Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Andrew Veitch
- Gastroenterology Department, New Cross Hospital, Wolverhampton, UK
| | - Jack Williams
- Department of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, UK
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9
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Kayamba V, Mutale W, Cassell H, Heimburger DC, Shu XO. Systematic Review of Cancer Research Output From Africa, With Zambia as an Example. JCO Glob Oncol 2021; 7:802-810. [PMID: 34077269 PMCID: PMC8459799 DOI: 10.1200/go.21.00079] [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: 01/05/2023] Open
Abstract
Cancer occurrence is increasing in Africa, although research has lagged. The objective of this review was to analyze cancer research outputs from Africa, with a particular focus on Zambia.
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Affiliation(s)
- Violet Kayamba
- Tropical Gastroenterology and Nutrition Group, Department of Internal Medicine, Lusaka, Zambia.,University of Zambia School of Medicine, Lusaka, Zambia
| | - Wilbroad Mutale
- University of Zambia School of Public Health, Lusaka, Zambia
| | - Holly Cassell
- Vanderbilt Institute for Global Health, Vanderbilt University Medical Center, Nashville, TN
| | - Douglas Corbett Heimburger
- University of Zambia School of Medicine, Lusaka, Zambia.,Vanderbilt Institute for Global Health, Vanderbilt University Medical Center, Nashville, TN.,Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
| | - Xiao-Ou Shu
- Vanderbilt Institute for Global Health, Vanderbilt University Medical Center, Nashville, TN.,Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN
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10
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Oluseyi Akande K, Oke TO, Afuwape O, Adigun TA, Akere A, Aje A, Ola SO, Otegbayo JA. Spectrum and pattern of distribution of findings in patients with dyspepsia undergoing oesophago-gastro-duodenoscopy at a Tertiary Hospital in Ibadan, south west, Nigeria. ALEXANDRIA JOURNAL OF MEDICINE 2021. [DOI: 10.1080/20905068.2021.1913890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/30/2022] Open
Affiliation(s)
- Kolawole Oluseyi Akande
- Department of Medicine, College of Medicine, Gastroenterology & Hepatology Unit, University of Ibadan, Ibadan, Nigeria
| | - Temitope Olufemi Oke
- Department of Medicine, Gastroenterology & Hepatology Unit, University College Hospital, Ibadan, Nigeria
| | - Oludolapo Afuwape
- Department of Surgery, College of Medicine, Division of Gastrointestinal Surgery, University of Ibadan, Ibadan, Nigeria
| | | | - Adegboyega Akere
- Department of Medicine, College of Medicine, Gastroenterology & Hepatology Unit, University of Ibadan, Ibadan, Nigeria
| | - Ajibola Aje
- Department of Medicine, Gastroenterology & Hepatology Unit, University College Hospital, Ibadan, Nigeria
| | - Samuel Olawale Ola
- Department of Medicine, College of Medicine, Gastroenterology & Hepatology Unit, University of Ibadan, Ibadan, Nigeria
| | - Jesse Abiodun Otegbayo
- Department of Medicine, College of Medicine, Gastroenterology & Hepatology Unit, University of Ibadan, Ibadan, Nigeria
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11
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Kayamba V. Nutrition and upper gastrointestinal cancers: An overview of current understandings. Semin Cancer Biol 2021; 83:605-616. [DOI: 10.1016/j.semcancer.2021.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 02/09/2021] [Accepted: 03/04/2021] [Indexed: 02/07/2023]
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Gallaher JR, Mulima G, Qureshi J, Shores CG, Charles AG. The role of endoscopy after upper gastrointestinal bleeding in sub-Saharan Africa: A prospective observational cohort study. Malawi Med J 2021; 32:139-145. [PMID: 33488985 PMCID: PMC7812143 DOI: 10.4314/mmj.v32i3.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background Upper gastrointestinal (UGI) bleed is a common surgical disease in sub-Saharan Africa where there is often a lack of diagnostic and interventional adjuncts such as endoscopy. This study sought to characterize the role of endoscopy in management of acute UGI bleeding. Materials and Methods This is a prospective observational analysis of adults presenting with an UGI bleed to a tertiary center in Lilongwe, Malawi, over two years. Patients were classified as having no endoscopy, diagnostic endoscopy, or endoscopy with variceal banding. Bivariate, survival analysis, and logistic regression analyses were used to compare intervention cohorts. Results 293 patients were included with 49 patients (16.7%) receiving endoscopy with banding, 65 (22.2%) patients receiving diagnostic endoscopy only, and 179 (61.1%) receiving no endoscopy. Upon survival analysis comparing to the no endoscopy group, cox hazard modelling showed an adjusted hazard ratio over 30 days of 0.12 (95% CI 0.02, 0.88, p=0.038) for the endoscopic banding group and a hazard ratio of 0.39 (95% CI 0.13, 1.16, p=0.090) for the diagnostic endoscopy only group. Physical exam findings consistent with cirrhosis and decreasing age were independent predictors of an endoscopic diagnosis of variceal bleeding. Conclusion Esophagogastric varices are a common cause of UGI bleeding in sub-Saharan Africa and can be predicted with age and physical exam findings. Endoscopy with variceal banding has a survival benefit for patients presenting with acute UGI bleed even with relatively low utilization. Appropriately triaging patients with likely variceal bleeding and improving endoscopy capacity would likely have a significant impact on mortality.
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Affiliation(s)
- Jared R Gallaher
- Department of Surgery, University of North Carolina School of Medicine, CB# 7228, Chapel Hill, NC, USA
| | - Gift Mulima
- Department of Surgery, Kamuzu Central Hospital, Lilongwe, Malawi
| | - Javeria Qureshi
- Department of Surgery, University of North Carolina School of Medicine, CB# 7228, Chapel Hill, NC, USA
| | - Carol G Shores
- Department of Surgery, Kamuzu Central Hospital, Lilongwe, Malawi.,Department of Otolaryngology/Head & Neck Surgery University of North Carolina School of Medicine, CB#7070, Chapel Hill, NC, USA
| | - Anthony G Charles
- Department of Surgery, University of North Carolina School of Medicine, CB# 7228, Chapel Hill, NC, USA.,Department of Surgery, Kamuzu Central Hospital, Lilongwe, Malawi
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Kasochi C, Julius P, Mweemba I, Kayamba V. Human epidermal growth factor receptor 2 overexpression in gastric and gastroesophageal junction adenocarcinoma in patients seen at the University Teaching Hospital, Lusaka, Zambia. Afr Health Sci 2020; 20:1857-1864. [PMID: 34394249 PMCID: PMC8351871 DOI: 10.4314/ahs.v20i4.41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND There are scanty data on the occurrence of gastric tumours overexpressing human epidermal growth factor receptor 2 (HER2) in Africa. OBJECTIVE To assess HER2 protein overexpression in gastric and gastroesophageal junction adenocarcinoma (GGEAC) samples from a single centre in Zambia. METHODOLOGY This was a cross-sectional study of formalin-fixed paraffin-embedded blocks with GGEAC. Prepared slides were first stained with Haematoxylin and Eosin and then evaluated for HER2 protein overexpression by immunohistochemistry. RESULTS A total of 57 gastric tissues were stained and evaluated for HER2 overexpression. Thirteen (23%) showed overexpression, 41/57 (72%) had negative and 3/57 (5%) had equivocal staining. The equivocal cases were excluded from the final analysis. Of the remaining 54 tissues, 28 (52%) were from females, and 26 (48%) were from males. The mean age was 59 years (SD 15 years). HER2 overexpression was highest in moderately differentiated tumours (p=0.0005). Intestinal type tumours had a higher occurrenc of HER2 overexpression than diffuse or mixed sub-types (p=0.0087). HER2 overexpression was not associated with age (p=0.27), sex (p=1.00) or anatomical location (p=1.00). CONCLUSION The occurrence of GGEAC HER2 overexpression in Zambian patients is similar to proportions reported elsewhere, and it is associated with moderately differentiated tumours of the intestinal type.
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Affiliation(s)
- Chimwasu Kasochi
- University Teaching Hospital, Department of Pathology, Nationalist Road, Private Bag RW1X, Lusaka, Zambia
| | - Peter Julius
- The University of Zambia, School of Medicine, Nationalist Road, PO Box 50110, Lusaka, Zambia
| | - Isaac Mweemba
- University Teaching Hospital, Department of Pathology, Nationalist Road, Private Bag RW1X, Lusaka, Zambia
| | - Violet Kayamba
- The University of Zambia, School of Medicine, Nationalist Road, PO Box 50110, Lusaka, Zambia
- Tropical Gastroenterology & Nutrition Group, Department of Internal Medicine, PO Box 50398, Nationalist Road, Lusaka, Zambia
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14
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Parker RK, Mwachiro MM, Topazian HM, Davis R, Nyanga AF, O'Connor Z, Burgert SL, Topazian MD. Gastrointestinal endoscopy experience of surgical trainees throughout rural Africa. Surg Endosc 2020; 35:6708-6716. [PMID: 33258037 DOI: 10.1007/s00464-020-08174-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 11/15/2020] [Indexed: 01/26/2023]
Abstract
BACKGROUND Gastrointestinal endoscopy (GIE) is not routinely accessible in many parts of rural Africa. As surgical training expands and technology progresses, the capacity to deliver endoscopic care to patients improves. We aimed to describe the current burden of gastrointestinal (GI) disease undergoing GIE by examining the experience of surgical training related to GIE. METHODS A retrospective review was conducted on GIE procedures performed by trainees with complete case logs during 5-year general surgery training at Pan-African Academy of Christian Surgeons (PAACS) sites. Cases were classified according to diagnosis and/or indication, anatomic location, intervention, adverse events, and outcomes. Comparisons were performed by institutional location and case volumes. Analysis was performed for trainee self-reported autonomy by post-graduate year and case volume experience. RESULTS Twenty trainees performed a total of 2181 endoscopic procedures. More upper endoscopies (N = 1,853) were performed than lower endoscopies (N = 325). Of all procedures, 546 (26.7%) involved a cancer or mass, 267 (12.2%) involved a report of blood loss, and 452 (20.7%) reported pain as a component of the diagnosis. Interventions beyond biopsy were reported in 555 (25%) procedures. Esophageal indications predominated the upper endoscopies, particularly esophageal cancer. Trainees in high-volume centers and in East Africa performed more interventional endoscopy and procedures focused on esophageal cancer. Procedure logs documented adverse events in 39 cases (1.8% of all procedures), including 16 patients (0.8%) who died within 30 days of the procedure. Self-reported autonomy improved with both increased endoscopy experience and post-graduate year. CONCLUSIONS GIE is an appropriate component of general surgery residency training in Africa, and adequate training can be provided, particularly in upper GI endoscopy, and includes a wide variety of endoscopic therapeutic interventions.
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Affiliation(s)
- Robert K Parker
- Department of Surgery, Tenwek Hospital, PO Box 39, Bomet, 20400, Kenya. .,Department of Surgery, Alpert Medical School of Brown University, Providence, RI, USA.
| | - Michael M Mwachiro
- Department of Surgery, Tenwek Hospital, PO Box 39, Bomet, 20400, Kenya.,Department of Endoscopy, Tenwek Hospital, Bomet, Kenya
| | - Hillary M Topazian
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Richard Davis
- Department of Surgery, AIC Kijabe Hospital, Kijabe, Kenya
| | - Albert F Nyanga
- Department of Internal Medicine, Mbingo Baptist Hospital, Bamenda, Cameroon
| | | | | | - Mark D Topazian
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
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15
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de Jong JJ, Lantinga MA, Thijs IME, de Reuver PR, Drenth JPH. Systematic review with meta-analysis: age-related malignancy detection rates at upper gastrointestinal endoscopy. Therap Adv Gastroenterol 2020; 13:1756284820959225. [PMID: 33209123 PMCID: PMC7645776 DOI: 10.1177/1756284820959225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 08/24/2020] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Age is an important and objective risk factor for upper gastrointestinal (GI) malignancy. The accuracy of various age limits to detect upper GI malignancy is unclear. Determination of this accuracy may aid in the decision to refer symptomatic patients for upper GI endoscopy. The aim of this analysis was to synthesize data on upper GI malignancy detection rates for various age limits worldwide through meta-analysis. METHODS We searched MEDLINE, EMBASE, and Web of Science in November 2018. Selection criteria included studies addressing malignant findings at upper GI endoscopy in a symptomatic population reporting age at time of diagnosis. Meta-analyses were conducted to derive continent-specific cancer detection rates. RESULTS A total of 33 studies including 346,641 patients across 21 countries fulfilled the inclusion criteria. To detect >80% of malignant cases all symptomatic patients over 40 years of age should be investigated in Africa, over 50 years of age in South America and Asia, and over 55 years of age in North America and Europe. CONCLUSION This systematic review and meta-analysis provides data on intercontinental variation in age at time of upper GI malignancy diagnosis in symptomatic patients referred for upper GI endoscopy. Guideline recommendations for age-based selection should be tailored to local age-related detection rates.
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Affiliation(s)
- Judith J. de Jong
- Department of Gastroenterology and Hepatology,
Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Marten A. Lantinga
- Department of Gastroenterology and Hepatology,
Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Ina M. E. Thijs
- Department of Gastroenterology and Hepatology,
Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Philip R. de Reuver
- Department of Surgery, Radboud University
Medical Centre, Nijmegen, The Netherlands
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16
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Kayamba V, Zyambo K, Mulenga C, Mwakamui S, Tembo MJ, Shibemba A, Heimburger DC, Atadzhanov M, Kelly P. Biomass Smoke Exposure Is Associated With Gastric Cancer and Probably Mediated Via Oxidative Stress and DNA Damage: A Case-Control Study. JCO Glob Oncol 2020; 6:532-541. [PMID: 32228314 PMCID: PMC7113078 DOI: 10.1200/go.20.00002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2020] [Indexed: 12/13/2022] Open
Abstract
PURPOSE We investigated the association between gastric cancer and environmental and dietary exposures. In addition, we explored probable mechanistic pathways for the influence of biomass smoke on gastric carcinogenesis. PATIENTS AND METHODS The study was conducted in Lusaka, Zambia. Questionnaires were used to collect data on risk factors, whereas enzyme-linked immunosorbent assays and high-performance liquid chromatography were used to measure biologic exposures. Study data were analyzed using contingency tables and logistic regression. RESULTS We enrolled 72 patients with gastric adenocarcinoma and 244 controls. Gastric cancer was positively associated with rural residence (odds ratio [OR], 2.9; 95% CI, 1.5 to 5.3), poverty (OR, 4.2; 95% CI, 1.9 to 9.1), and daily consumption of processed meat (OR, 6.4; 95% CI, 1.3 to 32) and negatively associated with consumption of green vegetables (OR, 0.2; 95% CI, 0.1 to 0.5). Gastric cancer was also associated with biomass smoke exposure (OR, 3.5; 95% CI, 1.9 to 6.2; P < .0001), an association that was stronger for intestinal-type cancers (OR, 3.6; 95% CI, 1.5 to 9.1; P = .003). Exposure to biomass smoke in controls was associated with higher urinary levels of 8-isoprostane (P < .0001), 8-hydroxydeoxyguanosine (P = .029), and 1-hydroxypyrene (P = .041). Gastric cancer was not associated with biochemical measures of current exposure to aflatoxins or ochratoxins. CONCLUSION In Zambia, exposure to biomass smoke, daily consumption of processed meat, and poverty are risk factors for gastric cancer, whereas daily consumption of green vegetables is protective against gastric cancer. Exposure to biomass smoke was associated with evidence of oxidative stress and DNA damage, suggesting mechanistic plausibility for the observed association, and the association was restricted to intestinal-type gastric cancer.
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Affiliation(s)
- Violet Kayamba
- Department of Internal Medicine, Tropical Gastroenterology and Nutrition Group, Lusaka, Zambia
- Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia
| | - Kanekwa Zyambo
- Department of Internal Medicine, Tropical Gastroenterology and Nutrition Group, Lusaka, Zambia
| | - Chola Mulenga
- Department of Internal Medicine, Tropical Gastroenterology and Nutrition Group, Lusaka, Zambia
| | - Simutanyi Mwakamui
- Department of Internal Medicine, Tropical Gastroenterology and Nutrition Group, Lusaka, Zambia
| | | | - Aaron Shibemba
- Department of Pathology, University Teaching Hospital, Lusaka, Zambia
| | | | - Masharip Atadzhanov
- Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia
| | - Paul Kelly
- Department of Internal Medicine, Tropical Gastroenterology and Nutrition Group, Lusaka, Zambia
- Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
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17
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Asombang AW, Chishinga N, Nkhoma A, Chipaila J, Nsokolo B, Manda-Mapalo M, Montiero JFG, Banda L, Dua KS. Systematic review and meta-analysis of esophageal cancer in Africa: Epidemiology, risk factors, management and outcomes. World J Gastroenterol 2019; 25:4512-4533. [PMID: 31496629 PMCID: PMC6710188 DOI: 10.3748/wjg.v25.i31.4512] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/05/2019] [Accepted: 07/19/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Esophageal cancer (EC) is associated with a poor prognosis, particularly so in Africa where an alarmingly high mortality to incidence ratio prevails for this disease. AIM To provide further understanding of EC in the context of the unique cultural and genetic diversity, and socio-economic challenges faced on the African continent. METHODS We performed a systematic review of studies from Africa to obtain data on epidemiology, risk factors, management and outcomes of EC. A non-systematic review was used to obtain incidence data from the International Agency for Research on Cancer, and the Cancer in Sub-Saharan reports. We searched EMBASE, PubMed, Web of Science, and Cochrane Central from inception to March 2019 and reviewed the list of articles retrieved. Random effects meta-analyses were used to assess heterogeneity between studies and to obtain odds ratio (OR) of the associations between EC and risk factors; and incidence rate ratios for EC between sexes with their respective 95% confidence intervals (CI). RESULTS The incidence of EC is higher in males than females, except in North Africa where it is similar for both sexes. The highest age-standardized rate is from Malawi (30.3 and 19.4 cases/year/100000 population for males and females, respectively) followed by Kenya (28.7 cases/year/100000 population for both sexes). The incidence of EC rises sharply after the age of 40 years and reaches a peak at 75 years old. Meta-analysis shows a strong association with tobacco (OR 3.15, 95%CI: 2.83-3.50). There was significant heterogeneity between studies on alcohol consumption (OR 2.28, 95%CI: 1.94-2.65) and on low socioeconomic status (OR 139, 95%CI: 1.25-1.54) as risk factors, but these could also contribute to increasing the incidence of EC. The best treatment outcomes were with esophagectomy with survival rates of 76.6% at 3 years, and chemo-radiotherapy with an overall combined survival time of 267.50 d. CONCLUSION Africa has high incidence and mortality rates of EC, with preventable and non-modifiable risk factors. Men in this setting are at increased risk due to their higher prevalence of tobacco and alcohol consumption. Management requires a multidisciplinary approach, and survival is significantly improved in the setting of esophagectomy and chemoradiation therapy.
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Affiliation(s)
- Akwi W Asombang
- Division of Gastroenterology/Hepatology, Warren Alpert Medical School of Brown University, Providence, RI 02903, United States
| | - Nathaniel Chishinga
- Department for HIV Elimination, Fulton County Government, Atlanta, GA 30303, United States
| | - Alick Nkhoma
- Department of Gastroenterology, Royal Stoke University Hospital, University Hospitals of North Midlands NHS Trust, Staffordshire ST4 6QG, United Kingdom
| | - Jackson Chipaila
- Department of Surgery, University Teaching Hospital-Adult Hospital, Lusaka 10101, Zambia
| | - Bright Nsokolo
- Department of Medicine, Levy Mwanawasa University Teaching Hospital, Tropical Gastroenterology and Nutrition Group (TROPGAN), Lusaka 10101, Zambia
| | - Martha Manda-Mapalo
- Department of Medicine, The University of New Mexico, Albuquerque, NM 87106, United States
| | | | - Lewis Banda
- Hematology/Oncology, Cancer Disease Hospital, Lusaka 10101, Zambia
| | - Kulwinder S Dua
- Department of Medicine and Pediatrics, Medical College of Wisconsin, Milwaukee, WI 53226, United States
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18
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Brenner A, Afolabi A, Ahmad SM, Arribas M, Chaudhri R, Coats T, Cuzick J, Gilmore I, Hawkey C, Jairath V, Javaid K, Kayani A, Mutti M, Nadeem MA, Shakur-Still H, Stanworth S, Veitch A, Roberts I. Tranexamic acid for acute gastrointestinal bleeding (the HALT-IT trial): statistical analysis plan for an international, randomised, double-blind, placebo-controlled trial. Trials 2019; 20:467. [PMID: 31362765 PMCID: PMC6668177 DOI: 10.1186/s13063-019-3561-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 07/08/2019] [Indexed: 12/29/2022] Open
Abstract
Background Acute gastrointestinal (GI) bleeding is an important cause of mortality worldwide. Bleeding can occur from the upper or lower GI tract, with upper GI bleeding accounting for most cases. The main causes include peptic ulcer/erosive mucosal disease, oesophageal varices and malignancy. The case fatality rate is around 10% for upper GI bleeding and 3% for lower GI bleeding. Rebleeding affects 5–40% of patients and is associated with a four-fold increased risk of death. Tranexamic acid (TXA) decreases bleeding and the need for blood transfusion in surgery and reduces death due to bleeding in patients with trauma and postpartum haemorrhage. It reduces bleeding by inhibiting the breakdown of fibrin clots by plasmin. Due to the methodological weaknesses and small size of the existing trials, the effectiveness and safety of TXA in GI bleeding is uncertain. The Haemorrhage ALleviation with Tranexamic acid – Intestinal system (HALT-IT) trial aims to provide reliable evidence about the effects of TXA in acute upper and lower GI bleeding. Methods The HALT-IT trial is an international, randomised, double-blind, placebo-controlled trial of tranexamic acid in 12,000 adults (increased from 8000) with acute upper or lower GI bleeding. Eligible patients are randomly allocated to receive TXA (1-g loading dose followed by 3-g maintenance dose over 24 h) or matching placebo. The main analysis will compare those randomised to TXA with those randomised to placebo on an intention-to-treat basis, presenting the results as effect estimates (relative risks) and confidence intervals. The primary outcome is death due to bleeding within 5 days of randomisation and secondary outcomes are: rebleeding; all-cause and cause-specific mortality; thromboembolic events; complications; endoscopic, radiological and surgical interventions; blood transfusion requirements; disability (defined by a measure of patient’s self-care capacity); and number of days spent in intensive care or high-dependency units. Subgroup analyses for the primary outcome will consider time to treatment, location of bleeding, cause of bleed and clinical Rockall score. Discussion We present the statistical analysis of the HALT-IT trial. This plan was published before the treatment allocation was unblinded. Trial registration Current Controlled Trials, ID: ISRCTN11225767. Registered on 3 July 2012; Clinicaltrials.gov, ID: NCT01658124. Registered on 26 July 2012. Electronic supplementary material The online version of this article (10.1186/s13063-019-3561-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Amy Brenner
- Clinical Trials Unit, Department of Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK.
| | - Adefemi Afolabi
- Department of Surgery, College of Medicine, University of Ibadan, University College Hospital, Queen Elizabeth Road, Ibadan, 200001, Nigeria
| | - Syed Masroor Ahmad
- Department of Medicine Unit III, Jinnah Postgraduate Medical Centre, Rafiq Shaheed Road, Karachi, 75510, Pakistan
| | - Monica Arribas
- Clinical Trials Unit, Department of Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Rizwana Chaudhri
- Rawalpindi Medical University, Holy Family Hospital, Rawalpindi, Pakistan
| | - Timothy Coats
- Department of Cardiovascular Sciences, University of Leicester, Infirmary Square, Leicester, LE1 5WW, UK
| | - Jack Cuzick
- Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, EC1M 6BQ, UK
| | | | - Christopher Hawkey
- Faculty of Medicine and Health Sciences, University of Nottingham, Queens Medical Centre, Nottingham, NG7 2UH, UK
| | - Vipul Jairath
- Division of Gastroenterology, Department of Medicine, University Hospital, Western University, London, Canada.,Department of Epidemiology and Biostatistics, Western University, London, ON, Canada
| | - Kiran Javaid
- Rawalpindi Medical University and London School of Hygiene and Tropical Medicine (RMU-LSHTM) Collaboration, Room No 294, Holy family Hospital, Said Pur Road, Rawalpindi, Pakistan
| | - Aasia Kayani
- Rawalpindi Medical University and London School of Hygiene and Tropical Medicine (RMU-LSHTM) Collaboration, Room No 294, Holy family Hospital, Said Pur Road, Rawalpindi, Pakistan
| | - Muttiullah Mutti
- Rawalpindi Medical University, Holy Family Hospital, Rawalpindi, Pakistan
| | - Muhammad Arif Nadeem
- Department of Medicine, Services Hospital Unit III, Medical Unit III, Jail Road, Lahore, Pakistan
| | - Haleema Shakur-Still
- Clinical Trials Unit, Department of Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Simon Stanworth
- Transfusion Medicine, NHS Blood and Transplant, Oxford, UK.,Department of Haematology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK.,Radcliffe Department of Medicine, University of Oxford, and Oxford BRC Haematology Theme, Oxford, UK
| | - Andrew Veitch
- Department of Gastroenterology, Royal Wolverhampton NHS Trust, Wolverhampton, UK
| | - Ian Roberts
- Clinical Trials Unit, Department of Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
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Kayamba V, Zyambo K, Kelly P. Presence of blood in gastric juice: A sensitive marker for gastric cancer screening in a poor resource setting. PLoS One 2018; 13:e0205185. [PMID: 30321216 PMCID: PMC6188746 DOI: 10.1371/journal.pone.0205185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 08/28/2018] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Gastric cancer survival rates in Africa are low as many cases are diagnosed late. Currently, there are no inexpensive, non-invasive and simple techniques that can be employed in poor resource settings for early case detection. In this study, we explored the possibility using blood in gastric juice as a screening tool to identify patients requiring referral for endoscopy. METHODS The study was conducted at the University Teaching Hospital endoscopy unit in Lusaka, Zambia. During esophagogastroduodenoscopy, gastric juice was aspirated and the pH determined using pH paper test strips. The presence of blood was tested using urinalysis reagent strips. RESULTS We enrolled 276 patients; 147(53%) were female and median age was 49 years (IQR 40-64 years). The presence of blood was associated with mucosal lesions, [OR 2.1; 95% CI 1.2-3.7, P = 0.004]. It was also associated with gastric cancer, [OR 6.7; 95% CI 2-35, P = 0.0005], even at 1:10 and 1:100 dilutions, [OR 5.4; 95% CI 2.3-13.8, P<0.0001] and [OR 9.1; 95% CI 3.5-23, P<0.0001] respectively. The sensitivity for gastric cancer detection using blood in gastric juice was 91% and the specificity was 41%. Analysis using the intensity of blood in gastric juice yielded an area under the receiver operating characteristic curve of 0.78; 95% CI 0.71-0.86 with a sensitivity of 79% and a specificity of 77%. CONCLUSIONS The presence of blood in gastric juice is associated with gastric mucosal lesions. It has a high sensitivity but low specificity for gastric cancer detection.
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Affiliation(s)
- Violet Kayamba
- Tropical Gastroenterology & Nutrition group, Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia
| | - Kanekwa Zyambo
- Tropical Gastroenterology & Nutrition group, Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia
| | - Paul Kelly
- Tropical Gastroenterology & Nutrition group, Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia
- Blizard Institute, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
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20
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Kayamba V, Nicholls K, Morgan C, Kelly P. A seven-year retrospective review of colonoscopy records from a single centre in Zambia. Malawi Med J 2018; 30:17-21. [PMID: 29868154 PMCID: PMC5974381 DOI: 10.4314/mmj.v30i1.4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Introduction Colorectal disease is common throughout the world, but the spectrum of diagnoses across Africa remains largely unexplored. There is anecdotal evidence of changing colorectal disease but this has not been systematically investigated. The aim of this study was to enhance our insight into the spectrum of colonoscopic diagnoses in Zambia. Methods We retrieved written colonoscopy reports from January 2008 to December 2015. Collected data were coded by experienced endoscopists and analysed by age, sex, referral source, indication and diagnosis. Results Included in this analysis were 573 colonoscopy reports. The most common diagnosis was haemorrhoids (n=151, 26%), followed by tumours (n=96,17%). Over this time period, the proportion of normal colonoscopies decreased by 32% (P<0.001), presumably due to introduction of screening of all requests, while the rate of polyp detection increased from 5% to 10% (P=0.006). The detection of polyps was highest in patients less than 16 years (OR 8.4; 95% CI 2.4–26.2, P<0.001). Of those with colorectal tumours, 33/96 (35%) were less than 45 years although the occurrence was higher with advancing age (P=0.02). Diverticular disease was more common in older age groups (median (IQR) age 70 (60–75) years, versus 47 (34–62) years for those without the disease; P=0.0001). Conclusion This audit has shown that more than a third of colorectal tumours seen during colonoscopy are in patients below the age of 45 years, with the occurrence of polyps being highest in those below 16 years. Diverticular disease is most common in older age groups.
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Affiliation(s)
- Violet Kayamba
- Tropical Gastroenterology & Nutrition group, University of Zambia School of Medicine, Nationalist Road, Lusaka, Zambia
| | - Kate Nicholls
- Blizard Institute, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London E1 2AT, United Kingdom
| | - Catrin Morgan
- Blizard Institute, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London E1 2AT, United Kingdom
| | - Paul Kelly
- Tropical Gastroenterology & Nutrition group, University of Zambia School of Medicine, Nationalist Road, Lusaka, Zambia.,Blizard Institute, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London E1 2AT, United Kingdom
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Koduru P, Irani M, Quigley EMM. Definition, Pathogenesis, and Management of That Cursed Dyspepsia. Clin Gastroenterol Hepatol 2018; 16:467-479. [PMID: 28899670 DOI: 10.1016/j.cgh.2017.09.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/28/2017] [Accepted: 09/05/2017] [Indexed: 02/07/2023]
Abstract
Dyspepsia is an umbrella term used to encompass a number of symptoms thought to originate from the upper gastrointestinal tract. These symptoms are relatively nonspecific; not surprisingly, therefore, a myriad of conditions may present with any one or a combination of these symptoms. Therein lays the clinician's first challenge: detecting the minority who may have a potentially life-threatening disorder, such as gastric cancer, from a population whose symptoms are, for the most part, considered functional in origin. The second challenge lies in the definition and management of those individuals with functional dyspepsia (FD); the major focus of this review. The Rome process has addressed the issue of FD definition and a look back at the evolution of Rome criteria for this disorder illustrates the complexities that have so frustrated us. There has been no shortage of hypotheses to explain symptom pathogenesis in FD; initially focused on gastric sensorimotor dysfunction, these have now strayed well into the duodenum and have come to entertain such factors as immune responses and the microbiome. FD has proven to be an equally challenging area for therapeutics; while the staple approaches of acid suppression and eradication of Helicobacter pylori have some limited efficacy in select populations, strategies to ameliorate symptoms in the majority of sufferers based on presumed pathophysiology have largely foundered. Lacking a validated biomarker(s) FD continues to be an elusive target and is likely to remain so until we can better define the various phenotypes that it must surely contain.
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Affiliation(s)
- Pramoda Koduru
- Lynda K and David M Underwood Center for Digestive Disorders, Division of Gastroenterology and Hepatology, Houston Methodist Hospital and Weill Cornell Medical College, Houston, Texas
| | - Malcolm Irani
- Lynda K and David M Underwood Center for Digestive Disorders, Division of Gastroenterology and Hepatology, Houston Methodist Hospital and Weill Cornell Medical College, Houston, Texas
| | - Eamonn M M Quigley
- Lynda K and David M Underwood Center for Digestive Disorders, Division of Gastroenterology and Hepatology, Houston Methodist Hospital and Weill Cornell Medical College, Houston, Texas.
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Kayamba V, Heimburger DC, Morgan DR, Atadzhanov M, Kelly P. Exposure to biomass smoke as a risk factor for oesophageal and gastric cancer in low-income populations: A systematic review. Malawi Med J 2018; 29:212-217. [PMID: 28955435 PMCID: PMC5610298 DOI: 10.4314/mmj.v29i2.25] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background Upper gastrointestinal cancers contribute significantly to cancer-related morbidity and mortality in sub-Saharan Africa, but they continue to receive limited attention. The high incidence in young adults remains unexplained, and the risk factors have not been fully described. Methods A literature search was conducted using the electronic database PubMed. Beginning from January 1980 to February 2016, all articles evaluating biomass smoke exposure with oesophageal and gastric cancer were reviewed. Results Over 70% of the African population relies on biomass fuel, meaning most Africans are exposed to biomass smoke throughout their lives. Cigarette smoke is an established risk factor for upper gastrointestinal cancers, and some of its carcinogenic constituents are also present in biomass smoke. We found eight case-control studies reporting associations between exposure to biomass smoke and oesophageal cancer, and two linking biomass smoke to gastric cancer. All of these papers reported significant positive associations between exposure and cancer risk. Further research is needed in order to fully define the constituents of biomass smoke, which could each have varying specific and synergistic or independent contributions to the development of upper gastrointestinal cancers Conclusions Exposure to biomass smoke is an environmental factor influencing the development of upper gastrointestinal cancers, especially in low-resource settings.
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Affiliation(s)
- Violet Kayamba
- Tropical Gastroenterology & Nutrition Group, University of Zambia School of Medicine, Lusaka, Zambia.,Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia
| | - Douglas C Heimburger
- Vanderbilt Institute for Global Health, Vanderbilt University, Nashville, Tennessee, USA.,Department of Medicine, School of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Douglas R Morgan
- Vanderbilt Institute for Global Health, Vanderbilt University, Nashville, Tennessee, USA.,Department of Medicine, School of Medicine, Vanderbilt University, Nashville, Tennessee, USA
| | - Masharip Atadzhanov
- Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia
| | - Paul Kelly
- Tropical Gastroenterology & Nutrition Group, University of Zambia School of Medicine, Lusaka, Zambia.,Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia.,Blizard Institute, Division of Gastroenterology, Barts & The London School of Medicine and Dentistry, London, United Kingdom
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Pritchett NR, Burgert SL, Murphy GA, Brockman JD, White RE, Lando J, Chepkwony R, Topazian MD, Abnet CC, Dawsey SM, Mwachiro MM. Cross sectional study of serum selenium concentration and esophageal squamous dysplasia in western Kenya. BMC Cancer 2017; 17:835. [PMID: 29216866 PMCID: PMC5721656 DOI: 10.1186/s12885-017-3837-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 11/23/2017] [Indexed: 12/13/2022] Open
Abstract
Background Low serum selenium status has been associated with increased risk of esophageal squamous cell carcinoma (ESCC). East Africa is a region of high ESCC incidence and is known to have low soil selenium levels, but this association has not previously been evaluated. In this study we assessed the association of serum selenium concentration and the prevalence of esophageal squamous dysplasia (ESD), the precursor lesion of ESCC, in a cross-sectional study of subjects from Bomet, Kenya. Methods 294 asymptomatic adult residents of Bomet, Kenya completed questionnaires and underwent endoscopy with Lugol’s iodine staining and biopsy for detection of ESD. Serum selenium concentrations were measured by instrumental neutron activation analysis. Odds ratios (OR) and confidence intervals (95% CI) for associations between serum selenium and ESD were calculated using unconditional logistic regression. Results The mean serum selenium concentration was 85.5 (±28.3) μg/L. Forty-two ESD cases were identified (14% of those screened), including 5 (12%) in selenium quartile 1 (Q1), 5 (12%) in Q2, 15 (36%) in Q3, and 17 (40%) in Q4. Higher serum selenium was associated with prevalence of ESD (Q4 vs Q1: OR: 3.03; 95% CI: 1.05–8.74) and this association remained after adjusting for potential confounders (Q4 vs Q1: OR: 3.87; 95% CI: 1.06–14.19). Conclusion This is the first study to evaluate the association of serum selenium concentration and esophageal squamous dysplasia in an African population at high risk for ESCC. We found a positive association between higher serum selenium concentration and prevalence of ESD, an association contrary to our original hypothesis. Further work is needed to better understand the role of selenium in the etiology of ESCC in this region, and to develop effective ESCC prevention and control strategies.
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Affiliation(s)
| | | | | | - John D Brockman
- University of Missouri Research Reactor Center, Columbia, MO, USA
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High prevalence of gastric intestinal metaplasia detected by confocal laser endomicroscopy in Zambian adults. PLoS One 2017; 12:e0184272. [PMID: 28886101 PMCID: PMC5590914 DOI: 10.1371/journal.pone.0184272] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 08/21/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Confocal laser endomicroscopy (CLE) may increase the detection of gastric premalignant lesions, and facilitate targeted biopsies for histology. The study aim was to analyse premalignant lesions in Zambian adults using CLE. METHODS Using CLE and histology we analysed the antral mucosa for gastric premalignant lesions in asymptomatic adults living with HIV and in HIV seronegative adults. Fasting gastric pH and the presence of Helicobacter pylori (H. pylori) were also evaluated. RESULTS We enrolled 84 HIV seropositive participants (median age 43 years; 55 (65%) female), of whom 32 (38%) were anti-retroviral therapy (ART)-naïve. Also enrolled were 22 HIV seronegative controls (median age 39 years, 12 (55%) females). Hypochlorhydria was found in 48 (57%) HIV positive and 8 (38%) HIV negative controls (P = 0.14). Detection of gastric intestinal metaplasia (GIM) was higher (P = 0.007) using CLE (49, 54%) than histology (9, 9%) and, using CLE, GIM was similar between HIV positive (41, 60%) and negative groups (8, 36%; P = 0.08). Gastric luminal fluorescein leakage was significantly associated with the presence of GIM [OR 8.2; 95% CI 2.5-31, P<0.001]. CONCLUSION CLE is useful for the detection of GIM, and luminal fluorescein leakage may represent a novel CLE marker for GIM. GIM is common in Zambian adults, and is highly prevalent irrespective of HIV infection or use of ART.
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