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Prevalence of Precancerous Lesions Based on Digital Cervicography with VIA/VILI among Women Positive for High-Risk Human Papillomavirus Serotypes: A Screening Center-Based Study in Cameroon

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Open Journal of Obstetrics and Gynecology 2024年第6期14卷 967-978页

作者： Jeffrey-Lewis Nzang Cliford Ebontane Ebong Simon Manga florence Manjuh félix essiben Isidore Tompeen Judith Seungue Serge Robert Nyada Jeanne Hortence fouedjio Ymele fouelifack Julius Sama Dohbit Kloukanmey Zonal Hospital Mdecins Sans Frontires Kloukanmey Benin faculty of Medicine and Biomedical Sciences University of Yaound 1 Yaound Cameroon Gynecology and Obstetrics Unit Central Hospital of Yaound Yaound Cameroon Womens Health Program Cameroon Baptist Convention Health Services Yaound Cameroon Department of Obstetrics and Gynaecology Gyneco-Obstetric and Pediatric Hospital of Yaound Yaound Cameroon Expanded Program of Immunization Ministry of Health Yaound Cameroon Department of Obstetrics and Gynaecology Gynaecological Endoscopic Surgery and Human Reproductive Teaching Hospital Yaounde Cameroon Department of Obstetrics and Gynaecology University of Dschang Dschang Cameroon Higher Institute of Medical Technology Nkolondom Yaound Cameroon

Background: Since 2021, high-risk Human Papilloma Virus (HR-HPV) testing has been the recommended screening test for cervical cancer for all settings;either used alone in a “test and treat” strategy, or with a triage test, with or without biopsy, before treatment. Cameroon has rolled out immunization against HPV 16 and 18, but studies show a higher prevalence of non-16/18 HR-HPV types. Objectives: Determine the prevalence of precancerous lesions, in women with HR-HPV infection and evaluate association of digital cervicography (DC) VIA/VILI positivity with HPV serotype, as a measure of their contribution to precancer and cancer incidence. Methodology: The study was cross-sectional, descriptive, and analytic. It took place at the Etoug-Ebe and Ekoudoum Baptist Hospitals in Yaoundé, during the period April-September 2022. We reviewed the records of women screened for cervical cancer between february 2020 and December 2021 and evaluated the prevalence of lesions on digital cervicography (DC) with VIA/VILI for women positive for HR-HPV serotypes. The data were analyzed using SPSS version 20.0 for Windows. P values Results: We identified 315 cases with a positive HR-HPV deoxyribonucleic acid (DNA) test, 224 (71.1%) had a DC VIA/VILI triage test done. Of these, 30 (13.4%) women had a positive DC VIA/VILI, with five women (2.2%) having lesions suggestive of cancer. Out of 11 cases positive for HPV 16 alone, 05 (45.5%) had a positive DC VIA/VILI test. Of the 14 cases positive for HPV 18 alone, 03 (21.4%) had a positive VIA/VILI, meanwhile only 19 (10.7%) of the 177 cases positive for non-16/18 HPV had a positive VIA/VILI test. Conclusion: A high proportion of women (13.4%) with HR HPV had a positive DC VIA/VILI, with a significant proportion (2.2%) having lesions suggestive of invasive cervical cancer HR-HPV serotype was associated with DC VIA/VILI positivity;HPV 16 had the strongest association (45.5%), followed by HPV 18 (21.4%), and non-16/18 HR-HPV (10.7%), suggesting a

关键词： High-Risk Human Papillomavirus Precancerous Digital Cervicography VIA/VILI Serotype

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Materno-foetal Morbidity in the Second Stage of Labour: A Cohort Study in Primiparous Women in Yaounde

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Open Journal of Obstetrics and Gynecology 2021年第12期11卷 1725-1734页

作者： félix essiben Khadidja Bayero Hapsatou Ahmadou Djoulatou Maye Ange Ngo Dingom Julius Sama Dohbit Cliford Ebontane Ebong Pascal foumane faculty of Medicine and Biomedical Sciences the University of Yaoundé I Yaoundé Cameroon Department of Obstetrics and Gynecology Faculty of Medicine and Biomedical Sciences Yaoundé Central Hospital Yaoundé Cameroon Central Maternity Yaoundé Central Hospital Yaoundé Cameroon Department of Obstetrics and Gynecology Yaounde Gyneco-Obstetric and Pediatric Hospital Yaoundé Cameroon

Introduction: Prolonged Second Stage of Labor (SSL) is known to increase maternal and foetal morbidity. We, therefore, aimed to assess for the occurrence of complications of the SSL in relation to its duration in primiparous women in Yaounde. Methods: It was a cohort study carried out at the Yaounde Gynaeco-Obstetric and Paediatric Hospital over a period of 6 months, from December 19, 2018 through May 3, 2019. We included for the study nulliparous pregnant women with singleton pregnancies and normal uteri. Data collected were analysed using EPI info 7 and SPSS version 2.0 software. Results: Amongst 327 nulliparas, the SSL lasted more than one hour in 120 (36.7%), and more than two hours in 42 (12.8%). The most common maternal complications observed were genital lacerations (23.6%;28/120), instrumental deliveries (20.2%, 24/120), post-partum haemorrhage (8.9%). Foetal complications included caput succedaneum (15.2%;18/120) and perinatal asphyxia (7.5%;9/120). Maternal complications were significantly increased in women with an SSL lasting 1 - 2 hours (44.9% versus 22.7%;p 0.001) and >2 hours (42.9% versus 22.7%;p = 0.007). Similarly, for foetal complications 23.1% occurred with SSLs between 1 -

关键词： Second Stage of Labour Duration Primiparas Morbidity Yaounde

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Histopathological Aspects of Placental Lesions in Mild and Severe Pre-Eclampsia in a Population of Cameroonian Women

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Open Journal of Obstetrics and Gynecology 2022年第2期12卷 154-168页

作者： félix essiben Ayissi Gregory Belinga Etienne Ndolo Kondo Astrid Ngo Dingom Madye Ange Ebong Cliford Ebontane Ojong Samuel Atomveng foumane Pascal Yaoundé Central Hospital Department of Obstetrics and Gynecology Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaoundé Cameroon Department of Obstetrics and Gynecology Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaoundé Cameroon Central Maternity Yaoundé Central Hospital Yaoundé Cameroon Yaounde Gyneco-Obstetric and Pediatric Hospital Department of Obstetrics and Gynecology Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaoundé Cameroon

Background: Pre-eclampsia (PE) frequently leads to adverse maternal and foetal outcomes in our setting. The pathophysiology is strongly linked to placental development. We aimed to study placental lesions associated with PE in a population of Cameroonian women. Methods: We conducted a cross-sectional, analytical study in three university teaching hospitals in Yaounde namely, the Yaounde Central Hospital, the pathology laboratory of the Yaounde University Hospital Centre, and the Yaounde Gynaeco-Obstetric and Paediatric Hospital. The study spanned 8 months from January 1st to September 1st, 2021. Placental analysis was carried out as per standard protocol. The study included 101 parturients with pre-eclampsia. These were divided into two groups, with groups 1 and 2 being made of patients with mild pre-eclampsia (n = 40), and severe pre-eclampsia (n = 61), respectively. Results: The mean ages of the two groups were 29.93 ± 7.36 versus 28.28 ± 7.18 (p = 0.267) for patients with mild and severe pre-eclampsia respectively. Low socioeconomic status was the most frequently identified risk factor in both groups (59%). Patients’ history revealed that the women with severe pre-eclampsia tended to have poor pregnancy follow-up compared to those with mild pre-eclampsia (p f patients with severe pre-eclampsia weighed significantly less than those of patients with mild pre-eclampsia (454.4 ± 122 vs. 511.7 ± 125;p ficantly greater in patients with severe disease (p Conclusion: PE-related placental lesions in our context are multiple and diverse especially in severe disease, and these arise as a result of defective maternal vascular perfusion.

关键词： Preeclampsia Placental Lesions Histological Aspects Placental Dysfunction Cameroon

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female fertility following Chemotherapy for Breast Cancer: A Descriptive Study of 265 Cases Treated in Yaounde

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Open Journal of Obstetrics and Gynecology 2020年第1期10卷 166-178页

作者： félix essiben Ngowa Jean Dupont Kemfang Aline Nganso Meka Juliette Esther Ngo Um Etienne Atenguena Samuel Ojong Paul Ndom Emile Telesphore Mboudou Yaoundé Central Hospital Department of Gynecology and Obstetrics Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon Department of Gynecology and Obstetrics Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon Yaounde Gyneco-Obstetric and Pediatric Hospital Department of Gynecology and Obstetrics Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon Yaounde General Hospital Yaoundé Cameroon Yaoundé General Hospital Department of Internal Medicine and Specialities Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon Douala Gyneco-Obstetric and Pediatric Hospital Department of Gynecology and Obstetrics Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon

Context: In Cameroon, breast cancer (BC) is usually diagnosed late in the disease course. About a third of women affected are aged less than 40 years. Chemotherapy (CT) could alter ovarian function and thereby compromise future fertility in these women. We therefore described the fertility of women following CT for BC in women treated at the Yaounde General Hospital (YGH). Methods: It was a retrospective, descriptive, cross-sectional study conducted over 8 months, from January to August 2017. We used the files of patients managed for BC from January 2011 to December 2015 in the medical oncology unit of the YGH. Results: We included 265 patients for the study following at least one year of CT. The mean age at the onset of CT was 35.9 ± 6.9 years. Most of the patients had fewer than 2 deliveries (68.3%). Intraductal carcinoma was the most frequent histological lesion (90.6%) and most often diagnosed in advanced stages (73.5%). As per CT, the fAC protocol was the most used (44.5%). The menstrual cycles of the patients were more regular prior to the onset of chemotherapy (89.4% vs. 58.9%), while the mean period of resumption of menstrual activity following cessation of chemotherapy was 6.3 ± 2.0 months. Chemotherapy-related amenorrhoea was observed in 29.1% of patients after 12 months of treatment. More than half of these women (51.3%) complained of a drop in libido and 6.4% achieved pregnancy within 13 months following cessation of chemotherapy. Conclusion: following chemotherapy for BC, menstrual cycle disorders are more frequent and this can affect the patients’ reproductive potential. fertility consultations should be integrated into the management plan of such patients.

关键词： Chemotherapy fertility Women of Childbearing Age Breast Cancer Yaounde

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Association between Placental Malaria and Severe Pre-Eclampsia in Two University Hospitals of Yaounde City

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Open Journal of Obstetrics and Gynecology 2024年第9期14卷 1488-1511页

作者： Ayissi Gregory Astrid Ruth Ndolo Kondo Ndoumba Afouba Alice Noa Ndoua Claude Cyrille essiben félix Meka Esther Belinga Etienne Metogo Junie Engo Engo Samuel Désiré Bodo Edmond Lemaire Tchente Nguefack Charlotte foumane Pascal Mboudou Emile Télésphore Department of Obstetrics and Gynecology Faculty of Medicine and Biomedicals Sciences University of Yaound I Yaounde Cameroon Department of Obstetrics and Gynecology Faculty of Medicine and Pharmaceuticals Sciences University of Douala Douala Cameroon Department of Morphological and Anatomo-Pathological Sciences Faculty of Medicine and Pharmaceutical Sciences University of Dschang Dschang Cameroon. Department of Morphological and Anatomo-Pathological Sciences Faculty of Medicine and Biomedicals Sciences University of Yaound I Yaounde Cameroon

Context: Pre-eclampsia and placental malaria, are two diseases that share pathophysiological similarities, such as placental ischemia, endothelial dysfunction and production of pro-inflammatory cytokines. Objective: The objective of our study was to investigate the association between placental malaria lesions and severe pre-eclampsia. Methodology: We conducted a prospective analytical cross-sectional study in two University Hospitals in the city of Yaounde (Yaounde Central Hospital and the Gynaecological Obstetrics and Paediatrics Hospital), and in the laboratory of the Centre Pasteur in Yaounde over an eight-month period (1st January 2021 – 1st September 2021). All patients with pre-eclampsia diagnosed according to the criteria of the International Society for the Study of Hypertension (ISSHP) and free of chronic metabolic or infectious pathology were included in this study. The patients were divided into two groups: group 1 (mild pre-eclampsia) and group 2: severe pre-eclampsia. Socio-demographic, clinical and histopathological characteristics specific to pre-eclampsia and placental malaria were investigated. Statistical analysis was performed with SPSS 23.0 software, Chi 2 was used to compare categorical variables, Student t-test was used to compare means, and logistic regression was used to assess the association between placental malaria lesions and PES. Results: The mean age of our study population was 29.93 ± 7.36 years versus 28.28 ± 7.18 years in patients with mild and severe pre-eclampsia respectively. Pre-eclampsia placental lesions (accelerated villous maturation, infarction) were significantly greater in patients with severe pre-eclampsia (p Conclusion: Placental malaria lesions were significantly associated with severe pre-eclampsia and increased the risk of developing severe pre-eclampsia placental lesions by a factor of 10.

关键词： Mild Pre-Eclampsia Severe Pre-Eclampsia Malaria Placental Lesions Association

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Maternal and fetal Outcomes of COVID-19 Pregnant Women followed Up at a Tertiary Care Unit: A Descriptive Study

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Open Journal of Obstetrics and Gynecology 2020年第10期10卷 1482-1491页

作者： Madye A. Ngo Dingom Eugène Sobngwi félix essiben Antoinette N. Assiga Yves f. Wasnyo Anicet Ngate Jean C. Katte Junie Y. Ngaha Philemon Nsem Charles E. Sone Brigitte Wandji Gilles T. Libend Jean J. Bissemou filbert E. Eko florent Y. fouelifack Glwadys Ngono Jeanne fouédjio Rebecca Tonye Pierre Ongolo-Zogo Pierre J. fouda Robinson E. Mbu Obstetrics and gynecology Unit Yaounde Central Hospital Yaounde Cameroon COVID 19 Unit Yaounde Central Hospital Yaounde Cameroon Department of Medicine and Biomedical Sciences University of Yaounde I Yaounde Cameroon Department of Public Health University of Exeter Exeter UK Department of Obstetrics and Gynecology Higher Institute of Medical Technology of Nkolondom Yaoundé Cameroon

Background: The SARS-CoV-2 and associated corona virus disease COVID-19 have been declared a pandemic having a poor prognosis among individuals with debilitating conditions and those who are immune-compromised. Current evidence is however limited on maternal and fetal transmission and pregnancy outcomes. We aimed to describe the pattern of SARS-CoV-2 infection and outcomes in a group of pregnant women followed up at a tertiary care unit in Cameroon. Methods: This was an observational study conducted over a period of 3 months (April 1 to June 30, 2020) at the Yaounde Central Hospital. All pregnant women who were tested positive for SARS-CoV-2 and who provided a signed written informed consent were included in the study. Results: Out of 83 pregnant women who presented with symptoms suspicious of COVID-19, 25 were tested positive. The median age of these women was 31 (27 - 35) years. A total of 76% consulted within 6 days of onset of symptoms and 68% had a gestational age greater than 28 weeks. The most common font-family:Verdana;">presenting complaint was fever (88%)

关键词： COVID-19 Pregnancy Mortality Outcomes

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Predictive factors for Pre-Eclampsia: A Case-Control Study in Two Hospitals in Yaounde

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Open Journal of Obstetrics and Gynecology 2024年第4期14卷 565-574页

作者： Junie Annick Metogo Ntsama Ines Winnie Gouanfo Claude Hector Mbia Wilfried Loic Tatsipie Pascal Mpono Madye Ngo Dingom felix essiben Claude Cyrille Noa Ndoua faculty of Medicine and Biomedical Sciences University of Yaound&#233 I Yaound&#233 Cameroon faculty of Medicine and Pharmaceutical Sciences University of Dschang Dschang Cameroon

Introduction: Pre-eclampsia is a major cause of maternal and prenatal morbidity and mortality, that complicates 2% to 8% of pregnancies worldwide. The aim of this study was to determine the predictive factors for pre-eclampsia in two hospitals in the city of Yaoundé. Methods: A case-control study was conducted at the Gynaecology & Obstetrics department of the Yaoundé Gynaeco-Obstetric and Paediatric Hospital (YGOPH) and the Main Maternity of the Yaoundé Central Hospital (MM-YCH) from february 1 to July 30, 2022. The cases were all pregnant women presenting with pre-eclampsia. The control group included pregnant women without pre-eclampsia. Descriptive statistics followed by logistic regression analyses were conducted with level of significance set at p-value Results: Included in the study were 33 cases and 132 controls, giving a total of 165 participants. The predictive factors for pre-eclampsia after multivariate analysis were: primiparity (aOR = 51.86, 95% CI: 3.01 - 1230.96, p = 0.045), duration of exposure to partner’s sperm Conclusion: The odds of pre-eclampsia increased with primiparity, duration of exposure to partner’s sperm f pre-eclampsia and maternal history of pre-eclampsia. Recognition of these predictor factors would improve the ability to diagnose and monitor women likely to develop pre-eclampsia before the onset of disease for timely interventions.

关键词： Pre-Eclampsia Predictive factors Yaoundé

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The Hidden Side of the Story between the Placenta and Preeclampsia: Preliminary Results of a Prospective Cohort of Pregnant Women in Cameroon

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Open Journal of Obstetrics and Gynecology 2024年第4期14卷 610-620页

作者： Junie Annick Metogo Ntsama Ambroise Merci Engounou Seme Urielle Julie Tchuente Sutchueng Wilfried Loic Tatsipie Christian Vagoda Henry-Leonard Chatelin Mol Madye Ngo Dingom felix essiben Cyrille Claude Noa Ndoua Yann chris Eng Odile fernande Zeh faculty of Medicine and Biomedical Sciences University of Yaound&#233 I Yaound&#233 Cameroon faculty of Medicine and Pharmaceutical Sciences University of Dschang Dschang Cameroon

Introduction: Pre-eclampsia is a complication of pregnancy that generally occurs in the third trimester. It is associated with a maternal and foetal mortality rate of around 27%. In view of the grim picture painted by this condition for both mother and newborn, studies have been carried out into the early detection of patients at risk of developing pre-eclampsia. These make it possible to introduce pregnancy-specific monitoring and preventive strategies to reduce the incidence of the condition. Objective: To establish the link between placental ultrasound characteristics and the onset of pre-eclampsia. Methodology: A multicentre prospective cohort study was conducted in two hospitals in Yaoundé, namely the Yaoundé Gynaecological Obstetrics and Paediatrics Hospital and the Nkolndongo Health and Social Animation Centre, in the gynaecology and radiology departments over a period of 11 months, from October 2022 to August 2023. It included pregnant women who had undergone obstetric ultrasound between 12 and 18 weeks’ gestation. In addition to routine obstetric ultrasound, we performed obstetric Doppler measurements in these patients. The resistance index of the left and right uterine arteries, the umbilical artery and the placental volume were the characteristics sought. At the end of this examination, two groups were formed: cases (pathological Doppler group) and controls (normal Doppler group). Blood pressure and urine dipstick were taken at each antenatal visit until delivery, then during the immediate postpartum period and finally at 7 days, 21 days and 42 days after delivery. Results: Sixty-seven (67) patients were included. Of these, 35 (47.8%) had pathological Dopplers. Sixteen patients had arterial hypertension associated with proteinuria and were therefore labelled as pre-eclampsia (PE). This gives a prevalence of 23.9%. fifteen (42.8%) of these patients belonged to the exposed group and one to the unexposed group. The mean IR of the pre-eclampsia patients was s

关键词： Pre-Eclampsia Doppler Ultrasound Placenta

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Maternal and foetal Outcomes Associated with Caesarean Deliveries in Patients with Severe Preeclampsia in Two Teaching Hospitals, Yaoundé

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Open Journal of Obstetrics and Gynecology 2018年第13期8卷 1271-1281页

作者： essiben félix Ngo Um Meka Esther Mve Koh Valère Gwos Laurentine Ojong Samuel foumane Pascal faculty of Medicine and Biomedical Sciences University of Yaounde Yaounde Cameroon Yaoundé Central Hospital Yaounde Cameroon Yaounde Gynaeco-Obstetric and Paediatric Hospital Yaounde Cameroon Yaounde Teaching Hospital Centre Yaounde Cameroon

Introduction: Severe preeclampsia is a frequent cause of maternal death, and also a frequent indication for caesarean deliveries when faced with the need to expedite delivery. We sought complications specific to caesarean deliveries in patients with severe preeclampsia. Methods: It was a case-control study carried out over 6 months, from December 1st, 2015 to May 31st, 2016 at the Yaoundé Central and the Yaoundé Gynaeco-Obstetric and Paediatric Hospitals. We evaluated 159 women undergoing a caesarean delivery to assess the risk of maternal and foetal postoperative complications in patients with severe preeclampsia. Significance level was set at 0.05. Results: The incidence of postoperative complications stood at 26.4%. Maternal and foetal complications were more frequent in preeclamptic women at 54.5% versus 11.5% (p f adverse events was greater in women with preeclampsia: pruritus and limb pain (RR = 2.96;p f high blood pressure (RR = 4.51, p first-line analgesics (RR = 3, p f postoperative complications.

关键词： Preeclampsia Postoperative Complications Caesarean Section Yaoundé

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Radiation Characteristics of Antennas on the Reactive Impedance Surface of a Circular Cylinder Providing Reduced Coupling

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Journal of Electromagnetic Analysis and Applications 2010年第4期2卷 195-204页

作者： Jean-francois D. essiben Eric R. Hedin Yong S. Joe 不详

The radiation characteristics of waveguide antennas located on the surface of a circular cylinder are investigated theoretically and numerically. A reactive impedance structure is used to provide reduced coupling between two antennas on the surface of a cylinder. Using the moment method, a solution to the problem of the radiation of a single and two parallel-plate waveguides located on the surface of a reactive impedance cylinder is derived. The influence of the reactive impedance structure on the coefficient of standing waves, the radiation patterns, and the decoupling between antennas is studied.

关键词： Decoupling Radiation Reactive Impedance Structure

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