RMRaissa Nana Sede Mbakop

Raissa Nana Sede Mbakop

*This is an algorithmically generated author record based on publicly available information.

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Previous Organizations / Institutes

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Raissa Nana Sede Mbakop has a total of 40 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Misidentified Metastases: Diagnosing and Managing Pyogenic Liver Abscesses in a Breast Cancer Survivor

    by Nkechi Ukoha, Inemesit Akpan, Raissa Nana Sede Mbakop, Eunice Hama

    Objective: Mistake in diagnosis Background: Pyogenic liver abscesses are collections of pus of varying sizes within the liver. They are rare and often overlooked in developed countries, and if left untreated, they can be life-threatening. Therefore, early detection and treatment are crucial for favorable outcomes. Due to the atypical presentation, a high level of suspicion is necessary, as seen in our patient's case. Case Report: This report pertains to a 76-year-old woman who was diagnosed with sepsis resulting from multiple hepatic abscesses. Initially, the abscesses were mistaken for metastatic breast cancer liver disease due to her history of breast cancer in remission for 3 years. However, further imaging and biopsy revealed the initial diagnosis to be incorrect. She had initially presented with nonspecific abdominal pain and diarrhea. The initial computed tomography (CT) scan of the abdomen indicated the development of extensive hepatic lesions, thought to be associated with breast cancer, but subsequent magnetic resonance imaging (MRI) suggested liver abscesses. Ultrasound-guided aspiration confirmed the presence of liver abscesses, and subsequent culture of the aspirate revealed the growth of Streptococcus intermedius. The patient responded well to a 4-week course of antibiotic therapy. Conclusions: This case report reviews the clinical presentation, risk factors, diagnosis, and management of multiple pyogenic liver abscesses, and shows the importance of using sound clinical reasoning in addressing diagnostic challenges of this nature.


  • Open Access

    Racial Differences in Non-variceal Upper Gastrointestinal (GI) Bleeding: A Nationwide Study

    by Raissa Nana Sede Mbakop, Arnold N. Forlemu, Chidiebube Ugwu, Elizabeth Soladoye, Kikelomo Olaosebikan, Emeka S. Obi, Dominic Amakye

    Background and aims Knowledge about the impact of race on non-variceal upper GI bleeding (NVUGIB) is limited. This study explored the racial differences in the etiology and outcome of NVUGIB. Methods We conducted a study from 2009 to 2014 using the Nationwide Inpatient Sample (NIS) database. NIS is the largest publicly available all-payer inpatient database in the USA with more than seven million hospital stays each year. The International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) codes for NVUGIB, esophagogastroduodenoscopy (EGD) and demographics were obtained. The outcomes of interest were in-hospital mortality, hospital length of stay (HLOS), total hospital charges, admission to the intensive care unit (ICU), and patient disposition. Analysis was conducted using Chi-square tests and Tukey multiple comparisons between groups. Results Among 1,082,516 patients with NVUGIB, African American and Native Americans had the highest proportions of hemorrhagic gastritis/duodenitis (8.2% and 4.2%, respectively) and Mallory-Weiss bleeding (10.4% and 5.4%, respectively; p<0.01). African Americans were less likely to get an EGD done within 24 hours of admission compared to Whites and Latinxs (45.9% vs 50.1% and 50.4%, respectively; p<0.001). In-hospital mortality was similar among African Americans, Latinxs, and Whites (5.8% vs 5.6% vs 5.9%, respectively; p=0.175). Asian/Pacific Islanders and African Americans were more likely to be admitted to the ICU (9.6% and 9.0%, respectively; p<0.001). Moreover, African Americans had a longer HLOS compared to Latinxs and Whites (7.5 vs 6.5 and 6.4 days, respectively; p<0.001). Conversely, Asian/Pacific Islanders and Latinx incurred the highest hospital total charges compared to African Americans and Whites ($81,821 and $69,267 vs $61,484 and $53,767, respectively; p<0.001). Conclusion African Americans are less likely to receive EGD within 24 hours of admission and are more likely to be admitted to the ICU with prolonged hospital lengths of stay. Latinxs are more likely to be uninsured and incur the highest hospital costs.


  • Su1471 IS SCHISTOSOMIASIS A RISK FACTOR OF CHOLANGIOCARCINOMA?

    by Arnold N. Forlemu, Praneeth K. Bandaru, Vijay Gayam, Raissa Nana Sede Mbakop, Jamil Shah, Vikash Kumar, Vishnu Poojitha Ronda, Pavani Garlapati, Denzil Etienne

  • Open Access

    Liver Segment Disposition of Hepatocellular Carcinoma Predicts Microvascular Invasion

    by Arnold Nongmoh Forlemu, Raissa Nana Sede Mbakop, Praneeth Bandaru, Vijay Gayam, Hamsika Moparty, Tomoki Sempokuya, Faruq Pradhan, Madhavi Reddy, Marco Olivera

    Background. Hepatocellular carcinoma (HCC) is a leading cause of cancer morbidity and mortality. Findings of microvascular invasion (MVI) in patients with HCC have emerged as an important prognostic factor for poor survival after tumor resection. Aim. This study evaluated the relation between MVI and HCC within various anatomical Couinaud’s segments of the liver. Method. A multicenter retrospective review of HCC records was conducted from 2012 to 2017. HCC cases were identified using ICD-9 and 10 codes 155, C22.0, and C22.8. HCC patients who underwent liver transplants were included in this study. Liver segment of the location of HCC was obtained from radiographic records, and MVI information was obtained from pathology reports. Segmental distributions of HCC in MVI versus non-MVI groups were compared using Wilcoxon rank sum tests. value was set at Results. We analyzed 120 HCC patients who underwent liver transplantation. The mean age of our cohort was 57 years, and the most common etiology of liver disease was hepatitis C at 58.3%. The median HCC size was 3.1 cm, and MVI was present in 23.3% of the explanted specimens. MVI was 2 to 3 times significantly higher in patients with HCC affecting segments 2 and 3 and segments 4b and 5 ( ). Moreover, median survival was significantly lower in patients with MVI versus those without MVI (50 vs. 137 months, ). Conclusion. MVI was significantly higher in HCC tumors located in liver segments 2 and 3 and 4b and 5, and survival was lower in patients with MVI compared with those without.


  • Open Access

    Multiple Acyl-CoA Dehydrogenase Deficiency: A Rare Cause of Hepatomegaly

    by Raissa Nana Sede Mbakop, Arnold Nongmoh Forlemu, Wuttiporn Manatsathit

    Multiple Acyl-CoA dehydrogenase deficiency (MADD) is an autosomal recessive disorder that can manifest with hepatic and muscular dysfunction. MADD can be fatal in neonates; however, late-onset MADD has a milder course and often becomes symptomatic during adulthood. A 20-year-old patient presented to the hepatology clinic with elevated liver enzymes and hepatomegaly. Several investigations including a liver biopsy were unremarkable. Subsequently, the patient developed rhabdomyolysis and nonketotic hypoglycemia raising suspicion for mitochondrial disorders. Plasma acylcarnitine levels performed showed elevated C4-C18:2 consistent with MADD. Although the patient denied a complete genetic evaluation, the patient had complete resolution of symptoms after riboflavin and diet modification.


  • Open Access

    Chicken Bone Ingestion Leads to Aortoesophageal Fistula With Catastrophic Bleeding

    by Raissa Nana Sede Mbakop, Jamil Shah, Arnold Forlemu, Vijay Gayam, Praneeth Bandaru, Vikash Kumar, Madhavi Reddy

    Aortoesophageal fistula (AEF) is an uncommon, but potentially fatal cause of upper gastrointestinal bleeding. Aortoesophageal fistulas caused by foreign body ingestion are rare but devastating. The classic clinical triad of AEF consists of mid-thoracic pain or dysphagia, a herald episode of hematemesis, followed by fatal exsanguination after a symptom-free period (Chiari’s triad). Computed tomography angiography (CTA) is the preferred diagnostic tool for identifying AEF and is substantially more sensitive than upper endoscopy for detecting AEF. Endoscopy can detect AEF as it might show pulsatile blood, pulsatile mass, hematoma, or adherent blood clot in the esophagus, or a deep esophageal tear. However, endoscopy has a low sensitivity and may delay definitive treatment. Several management options for AEF have been suggested; however, the definitive treatment is surgery performed on the thoracic aorta and esophagus, including esophagectomy, surgical replacement of the thoracic aorta, thoracic endovascular aortic repair, or omental flap. We report a case of a 63-year-old man who presented with hematemesis 2 weeks after chicken bone ingestion.


  • Open Access

    Effect of Comorbidities on Inflammatory Bowel Disease-Related Colorectal Cancer: A Nationwide Inpatient Review

    by Arnold N. Forlemu, Raissa Nana Sede Mbakop, Shehroz Aslam, Zaid Ansari, Indu Srinivasan, Keng-Yu Chuang

    The risk of inflammatory bowel disease-associated colorectal cancer (IBD-CRC) is known to increase with primary sclerosing cholangitis (PSC) and a family history of CRC. However, the impact of comorbidities such as liver disease, obesity, diabetes, chronic lung, heart, and renal disease, and psychiatric illness on the risk of IBD-CRC remains unclear. We evaluated the effect of these comorbidities on the risk of IBD-CRC. A retrospective review from 2009 to 2014 was conducted using the National Inpatient Sample data for adults 18 years and older. Patients with IBD (360,892), of whom 2,831 had CRC were identified using the International Classification of Diseases, Ninth Revision codes (ICD-9). Data on comorbidities were also obtained. Adjusted odds ratios (aOR) and confidence intervals (CI) were computed via logistic regression to evaluate the effect of comorbidities on the risk of IBD-CRC; the p-value was set at <0.05. The mean age of IBD patients in this study was 52.36±0.03. A majority of the patients with IBD-CRC were white and were significantly older compared to those without cancer (60 vs 52 years, p<0.05). The risk of colon cancer in IBD was increased by having a non-cholestatic liver disease (aOR 1.51, CI 1.23-1.86, p<0.01). Also, patients younger than 50 years with liver disease were at an increased risk of IBD-associated colon cancer in comparison to older patients (aOR 1.83 vs 1.34, p<0.05). Notably, diabetes, chronic pulmonary disease, renal failure, psychiatric illnesses, and rheumatoid diseases, were inversely associated with the risk of IBD-CRC (p<0.05). After stratifying by IBD subtypes, non-cholestatic liver disease was still independently associated with a higher risk for colon cancer in patients with ulcerative colitis or Crohn's disease (ulcerative colitis: aOR 1.43, CI 1.08-1.89; Crohn's disease: aOR 1.46, CI 1.10-2.00). Patients with IBD who have non-cholestatic liver disease might have a higher risk for colon cancer, even at a younger age. These patients may require close colon cancer surveillance.


  • Open Access

    APRI Score and Conventional Liver Ultrasonography Accurately Evaluate Liver Fibrosis in Hepatitis C Patients in an African Hospital Setting

    by Raïssa Nana Sede Mbakop, Mathurin Pierre Kowo, Firmin Ankouane Andoulo, Antonin Wilson Ndjitoyap Ndam, Jean Roger Mouliom Tapouh, Jean Claude Mballa Amougou, Patricia Guekam Ouamba, Samuel Nko’O Amvene, Oudou Njoya