Back to Authors

El Ghazal, Nour

0000-0001-9179-6021

Mayo Clinic

Mayo Clinic

Citations 7

A Comprehensive Analysis of Predictors of Marginal Ulcers After Roux-en-Y Gastric Bypass: A Cohort Review of 2106 Patients
Abedalqader, Tala, Migliorini, Alberto, Cerecedo, Leonardo Garcia , Ghazal, Nour El , Klim, Joseph , Boutros, Tony, Laplante, Simon , Ghanem, Omar M., El Ghazal, Nour , Laplante, Simon J , Abedalqader, Tala , Ghanem, Omar M.

Medicina | April 29, 2026 | Volume: 62 | Issue: 5 | Pages: 838

10.3390/medicina62050838 Get It

Background and Objectives: Roux-en-Y gastric bypass (RYGB) is one of the most commonly performed metabolic and bariatric surgeries worldwide. Marginal ulcers (MU) are a common complication following RYGB, yet their pathophysiology and the contributing risk factors to their development are not fully understood. Materials and Methods: This retrospective cohort study examined patients who underwent RYGB between January 2008 and December 2023, with 1 to 5 years of follow-up. Data collected included patient- and procedure-related risk factors, as well as postoperative MU events. Statistical analysis methods included the independent samples t-tests, multivariate regression, and Cox regression analyses. Results: Our final cohort included 2106 patients and was predominantly female (80.5%), with a mean age of 47.8 ± 12.1 years and body mass index (BMI) of 45.5 ± 7.5 kg/m2. MU occurred in 241 (11.4%) patients, with a mean time to occurrence of 4.5 ± 0.02 years. History of smoking (HR = 1.87, p < 0.001) and gastroesophageal reflux disease (HR = 2.36, p < 0.001) significantly increased hazard for MU, while proton pump inhibitor use (HR = 0.18, p < 0.001) was associated with reduced hazard. Aspirin exposure, regardless of dose and chronicity, did not impact MU. Conclusions: Our findings highlight the importance of preoperative assessment and counseling in patients planning to undergo RYGB. Patient-related factors should guide postoperative monitoring and prophylaxis of MU, as this remains a debated topic amongst experts.
Metabolic and Bariatric Surgery vs Glucagon-like peptide-1 Receptor Agonist Therapy
Ghusn, Wissam, Abedalqader, Tala, Ghazal, Nour El, Espinosa, Maria Antonia, Villamarin, Jose, Gutierrez, Rene Rivera, Castaneda, Regina , Bechenati, Dima , Fansa, Sima , Hurtado, Maria D., Acosta, Andres, Ghanem, Omar M., Jawhar, Noura , El Ghazal, Nour , Castaneda, Regina , Ghusn, Wissam , Vierkant, Robert A. , Abedalqader, Tala , Villamarin, Jose L. , Gutiérrez, René de Jesús Rivera , Hurtado, M D, Acosta, Andres , Ghanem, Omar M.

Annals of Surgery | April 20, 2026 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.1097/sla.0000000000007064 Get It

Objective: To compare 1-year changes in estimated 10-year and lifetime atherosclerotic cardiovascular disease (ASCVD) risk following metabolic and bariatric surgery (MBS) versus glucagon-like peptide-1 receptor agonist (GLP-1RA) therapy among adults with obesity. Summary Background Data: Obesity is a major driver of ASCVD through adverse metabolic and inflammatory pathways. Metabolic and bariatric surgery and GLP-1 receptor agonists represent the most effective contemporary treatments for obesity and are increasingly used to mitigate cardiovascular risk. However, their comparative effects on integrated short-term and lifetime ASCVD risk in real-world clinical practice remain incompletely characterized. Methods: We conducted a retrospective cohort study of adults with obesity (body mass index ≥30 kg/m²) who underwent MBS or initiated GLP-1RA therapy between 2020 and 2023 within a large tertiary health care system in the United States. Participants were identified from electronic health records and followed for 12 months. Primary outcomes were 1-year changes in estimated 10-year and lifetime ASCVD risk. Secondary outcomes included percent total body weight loss, blood pressure, and lipid parameters. Multivariable linear regression models were used to adjust for baseline body mass index and baseline ASCVD risk. Results: The final cohort included 812 patients, of whom 579 underwent MBS and 233 initiated GLP-1RA therapy. At baseline, patients receiving GLP-1RAs were older and had higher estimated ASCVD risk. At 1 year, reductions in 10-year ASCVD risk were similar between groups (−0.8% vs. −1.1%; P =.36). In contrast, lifetime ASCVD risk decreased significantly more following MBS than GLP-1RA therapy (−8.6% vs. −1.7%; P <.001). MBS was associated with greater percent total body weight loss (−27.8% vs. −11.1%; P <.001) and more favorable lipid changes, including larger reductions in low-density lipoprotein cholesterol and greater increases in high-density lipoprotein cholesterol. After adjustment, MBS remained independently associated with a greater reduction in lifetime ASCVD risk compared with GLP-1RA therapy (β −6.92; 95% CI −9.22 to −4.62). Conclusions: In this real-world cohort, both MBS and GLP-1RA therapy were associated with improvements in estimated cardiovascular risk, but MBS conferred substantially greater reductions in lifetime ASCVD risk, accompanied by superior weight loss and lipid improvements. These findings highlight the complementary roles of surgical and pharmacologic therapies in obesity management and may inform strategies to optimize long-term cardiovascular risk reduction.
The Complexities of Reoperative Metabolic and Bariatric Surgery–A Retrospective Review of Outcomes at a Single Large Institution
Bocchinfuso, Sara , Abedalqader, Tala, Ghazal, Nour El, Laplante, Simon , Mehta, Kabir , Ghanem, Omar M., Ghazal, Nour El , Jawhar, Noura , El Ghazal, Nour , Sample, Jack W. , Abedalqader, Tala , Ghanem, Omar M.

Surgical Laparoscopy, Endoscopy & Percutaneous Techniques | March 9, 2026 | Volume: 36 | Issue: 3 | Pages: No page available

10.1097/sle.0000000000001455 Get It

Background: Reoperative metabolic and bariatric surgery (MBS), consisting of revision and conversion surgery, carries higher morbidity and mortality compared with primary procedures, yet robust long-term data are limited. Methods: A retrospective review was conducted of all patients 18 years of age or older who underwent first-time reoperative MBS between 2000 and 2024 at a single large quaternary referral center. Data were stored securely and analyzed in R (v4.4.2) using standard descriptive statistics and group tests ( t tests/Wilcoxon/Kruskal-Wallis; χ²/Fisher). Sparse late-complication data precluded pairwise tests. Results: Three hundred sixty patients, 86% female, mean age 50 years, underwent reoperative MBS. Conversion to Roux-en-Y gastric bypass (49%) was the most common surgery. The majority were performed for weight recidivism (37%). Length of stay, estimated blood loss, length of surgery, complication rates, readmission rates, and reintervention rates varied by type of reoperative MBS performed and indication. Most early complications were Clavien-Dindo 2, and most late complications were Clavien-Dindo 3b for all approaches. There was one procedure-related death in the study following an open conversion. Conclusion: In this 24-year single-center cohort, weight recidivism was the most frequent indication for reoperation and was associated with improved perioperative outcomes and durable long-term weight loss. As the landscape of bariatric surgery continues to evolve, we recommend early referral to centers with reoperative MBS expertise.
Procedure-Specific Early Complications Following Bariatric Surgery: A High-Volume Single-Institution Analysis
Ghusn, Wissam , Ghazal, Nour El , Kellogg, Todd A., Ghanem, Omar M., El Ghazal, Nour , Mosleh, Kamal Abi , Jawhar, Noura , Salameh, Yara , Ghanem, Omar M.

Surgical Laparoscopy, Endoscopy & Percutaneous Techniques | September 22, 2025 | Volume: 35 | Issue: 6 | Pages: No page available

10.1097/sle.0000000000001406 Get It

Background: Metabolic and bariatric surgery (MBS) is an established treatment for severe obesity and its related comorbidities. While long-term outcomes are often emphasized, early postoperative complications remain a critical metric of safety and resource utilization. Large database studies have reported national trends in MBS outcomes but are limited by lack of granularity, inconsistent definitions, and inclusion of heterogeneous surgical experience. This study aimed to provide a detailed analysis of 30-day postoperative complications following sleeve gastrectomy (SG), Roux-en-Y gastric bypass (RYGB), and duodenal switch (DS) over a 17-year period at a single high-volume quaternary academic center. Materials and Methods: A retrospective cohort study of adult patients who underwent primary laparoscopic SG, RYGB, or DS between 2008 and 2024. All procedures were performed by fellowship-trained, minimally invasive bariatric surgeons. Complications occurring within 30 days postoperatively were identified through comprehensive chart review and classified using the Clavien-Dindo grading system. Primary outcomes included incidence, severity, and type of complications, as well as rates of readmission, reoperation, and reintervention. Multivariable logistic regression was used to identify predictors of overall and major complications. Results: Of 2190 patients included, 413 (18.9%) experienced at least 1 early complication, totaling 467 discrete events. DS had the highest complication rate (29.3%), followed by RYGB (18.4%) and SG (17.5%). RYGB was associated with a high burden of major complications, including anastomotic strictures, GI bleeding, and reoperations for obstruction or leak. The 30-day rates of readmission (2.0%) and reoperation (1.3%) were low across all groups. Independent predictors of major complications included venous stasis (aOR=3.22), renal insufficiency (aOR=2.65), and type 2 diabetes (aOR=1.96); both RYGB (aOR=2.25) and DS (aOR=2.77) carried higher risk than SG. Conclusion: This study provides a granular, procedure-specific profile of early complications after SG, RYGB, and DS. While all 3 procedures demonstrated acceptable safety profiles, DS had the highest overall complication rate, and RYGB carried the greatest burden of major complications. These findings underscore the variability in early postoperative outcomes by procedure type and reflect the value of institutional experience in characterizing complication profiles.
Hypoabsorption in Bariatric Surgery: Is the Benefit Worth the Risk?
Abedalqader, Tala , Jawhar, Noura , Gajjar, Aryan , Portela, Ray , Perrotta, Gerardo , Ghazal, Nour El , Laplante, Simon , Ghanem, Omar M. , El Ghazal, Nour , Laplante, Simon J , Perrotta, Gerardo

Medicina | February 25, 2025 | Volume: 61 | Issue: 3 | Pages: 398

10.3390/medicina61030398 Get It

Metabolic and bariatric surgery has been well described in the existing literature to be an effective and safe modality for weight loss in patients with obesity. Recently, hypoabsorptive procedures such as one-anastomosis gastric bypass (OAGB), biliopancreatic diversion with duodenal switch (BPD-DS), and single-anastomosis duodenoileostomy with sleeve (SADI-S) have gained traction, particularly among patients with severe obesity. These procedures combine restrictive and hypoabsorptive mechanisms, resulting in significant and sustainable weight loss, especially in those with severe obesity and associated comorbidities. However, the risk of malnutrition and nutritional deficiency following these procedures has been a deterrent for surgeons in their adoption. This review evaluates the existing literature on the safety, efficacy, and long-term outcomes of OAGB, BPD-DS, and SADI-S. While these hypoabsorptive procedures represent highly effective options for treating obesity, the associated nutritional complications necessitate the need for long-term follow-up and supplementation and highlight the need for careful patient selection.
Dexamethasone versus prednisone/prednisolone in the management of pediatric patients with acute asthmatic exacerbations: a systematic review and meta-analysis
Dahan, Elise, Ghazal, Nour El , Nakanishi, Hayato , Haddad, Joe El , Tosovic, Danijel , Than, Christian A., Stiasny, David, Than, Christian A. , Matar, Reem H, Than, Christian A , El Ghazal, Nour , Matar, Reem , Beran, Azizullah

Journal of Asthma | December 3, 2022 | Volume: 60 | Issue: 8 | Pages: 1481-1492

10.1080/02770903.2022.2155189 Get It

Platelet‐rich plasma versus corticosteroid injections in the management of patients with rotator cuff disease: A systematic review and meta‐analysis
Adra, Maamoun , Ghazal, Nour El , Nakanishi, Hayato , Smayra, Karen , Hong, Sam S., Miangul, Shahid , Than, Christian A., Tennent, Duncan , Than, Christian A. , Matar, Reem H, Than, Christian A , Than, Christian A , El Ghazal, Nour , Matar, Reem

Journal of Orthopaedic Research | October 17, 2022 | Volume: 41 | Issue: 1 | Pages: 7-20

10.1002/jor.25463 Get It

AbstractPlatelet‐rich plasma (PRP) is an alternative to corticosteroid (CS) injections in managing rotator cuff disease. This meta‐analysis investigated differences between PRP and CS for function and pain scores in significance and minimal clinical important difference (MCID). A literature search of Ovid Cochrane Library, Medline, Embase, Epub, and Scopus was conducted from inception to October 28, 2021. Eligible studies reported patients older than 18 years with a diagnosis of rotator cuff disease. This review was registered in PROSPERO (ID: CRD42021278740). Twelve studies met eligibility criteria (n = 639) of patients receiving either PRP or CS. At short‐term follow‐up, a difference favored CS compared to PRP in baseline change for disability of arm, shoulder, and hand (DASH) score (MD = −5.08, 95% CI: −8.00, −2.15; p = 0.0007; I2 = 0%) and simple shoulder test (SST) (MD = 1.25, 95% CI: 0.33, 2.18; p = 0.008; I2 = 0%). At intermediate follow‐up, a difference favored PRP to CS baseline change of the DASH score (MD = 3.41, 95% CI: 0.67, 6.15; p = 0.01; I2 = 0%). At medium‐term, a difference favored PRP to CS baseline change of the American Shoulder and Elbow Surgeons Shoulder (ASES) score (MD = −4.42, 95% CI: −8.16, −0.67; p = 0.02; I2 = 0%). Both treatments achieved individual MCID for each score. Despite favoring CS at short‐term follow‐up and PRP at intermediate‐ and medium‐term follow‐up, functional and pain scores did not demonstrate any clinical difference between the two treatment modalities in management of rotator cuff disease at all follow‐up periods.