Publications by authors named "Ibrahim Nassour"

Article Synopsis
  • The study examines the effectiveness and feasibility of robotic total pancreatectomy (RTP) compared to open total pancreatectomy (OTP) for pancreatic cancer, highlighting a shift towards more robotic surgeries over time.
  • Analyzed data from 188 RTP and 3,447 OTP patients from 2010 to 2019 found no significant differences in outcomes such as mortality rates and oncological effectiveness, but RTP patients experienced a shorter hospital stay.
  • Overall survival rates were similar for both methods, suggesting that RTP is a viable option for pancreatic cancer surgery without compromising patient outcomes.
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Background/objectives: Combined hepatocellular cholangiocarcinoma (cHCC-ICC) is a rare malignancy that involves a combination of features of hepatocellular carcinoma and intrahepatic cholangiocarcinoma (ICC) and exhibits a more aggressive clinical course; however, its risk factors and outcomes remain largely undefined.

Methods: This study is a single-center retrospective study of 82 patients diagnosed with ICC or cHCC-ICC who underwent surgical resection from June 2011 to January 2023. Our analysis included 70 patients with resected ICC and 12 with resected cHCC-ICC.

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Total pancreatectomy is a complex procedure used in the management of pancreatic cancer. While minimally invasive techniques have been increasingly adopted, limited data exist comparing robotic total pancreatectomy (RTP) and laparoscopic total pancreatectomy (LTP). This study evaluates the utilization, short- and long-term outcomes of RTP and LTP using the National Cancer Database.

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Article Synopsis
  • This clinical practice guideline from the ASGE offers evidence-based recommendations for using endoscopy to diagnose and manage pancreatic masses, focusing on needle selection and sample processing.
  • It advises the use of fine-needle biopsy (FNB) needles, particularly 22-gauge over 25-gauge, and recommends fork-tip or Franseen needle types, while suggesting against routine rapid on-site evaluation (ROSE) for initial tissue acquisitions.
  • For managing biliary obstructions and pain in unresectable cases, it recommends self-expandable metal stents (SEMSs) over plastic stents, with covered SEMSs preferred when malignancy is confirmed, and celiac plexus neurolysis (CPN) for abdominal pain.
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Background: Distal pancreatic ductal adenocarcinoma (D-PDAC) often presents at an advanced stage. The efficacy of neoadjuvant therapy (NAT) in improving outcomes for D-PDAC is not well-established. This study evaluates the impact of NAT on the oncological outcomes of patients with D-PDAC.

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Introduction: Pancreatic ductal adenocarcinoma (PDAC) is currently the third-leading cause of cancer-related death in the United States. African Americans (AAs) with PDAC have worse survival in comparison to other racial groups. The COVID-19 pandemic caused significant stress to the healthcare system.

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Background: Pancreaticoduodenectomy (PD) remains the only curative option for patients with pancreatic adenocarcinoma (PDAC). Infectious complications (IC) can negatively impact patient outcomes and delay adjuvant therapy in most patients. This study aims to determine IC effect on overall survival (OS) following PD for PDAC.

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Background: Gallbladder carcinoma (GBC) is a rare, aggressive malignancy comprising 0.5% of gastrointestinal cancers. It has poor survival outcomes due to its insidious onset, lack of standardized screening, and limited therapies.

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Over the last two decades, there have been many reported advances in the clinical management of pancreatic ductal adenocarcinoma (PDAC). We sought to evaluate changes in survival for patients diagnosed with PDAC between 2004 and 2017. The National Cancer Database was queried for patients diagnosed with PDAC between 2004 and 2017.

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For patients with localized pancreatic cancer with minimal vascular involvement, optimal survivability requires a multidisciplinary approach of surgical resection and systemic chemotherapy. FOLFIRINOX is a combination chemotherapy regimen that offers promising results in the perioperative and metastatic settings; however, it can cause significant adverse effects. Such toxicity can negatively impact some patients, resulting in chemotherapy discontinuation or surgical unsuitability.

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Background: Biopsy of suspected pancreatic cancer (PDAC) in surgical candidates is informative however not always necessary. Biopsies impact treatment options as histological diagnosis are presently required for neo-adjuvant therapy, but not surgical resection. We explored the impact of pursuing tissue diagnosis by endoscopic ultrasound (EUS) biopsy on time to treatment in patients with resectable and borderline resectable PDAC.

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Background: Recent studies support early drain removal after pancreaticoduodenectomy in patients with a drain fluid amylase on postoperative day 1 (DFA1) level of ≤5,000. The use of DFA1 to guide drain management is increasingly common among pancreatic surgeons; however, the benefit of checking additional drain fluid amylases beyond DFA1 is less known. We sought to determine whether a change in drain fluid amylase (ΔDFA) is a more reliable predictor of clinically relevant postoperative fistula than DFA1 alone.

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Background: The historical standard of care in treating operable pancreatic cancer via upfront surgery has been challenged recently using a neoadjuvant approach. The aim of the study is to examine the national practice patterns in the management of pancreatic cancer with an emphasis on the trends of neoadjuvant systemic therapy use.

Methods: This is a cross-sectional time-series study using the National Cancer Database from 2006 to 2019.

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Background/objectives: The inherently immunosuppressive tumor microenvironment along with the heterogeneity of pancreatic ductal adenocarcinoma (PDAC) limits the effectiveness of available treatment options and contributes to the disease lethality. Using a machine learning algorithm, we hypothesized that PDAC may be categorized based on its microenvironment inflammatory milieu.

Methods: Fifty-nine tumor samples from patients naïve to treatment were homogenized and probed for 41 unique inflammatory proteins using a multiplex assay.

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Background: Duodenal adenocarcinoma (DA) is a rare malignancy without validated tumor markers. In practice, carcinoembryonic antigen (CEA) and carbohydrate antigen (CA 19-9) are often used in the management of DA, though their prognostic value is unknown.

Materials And Methods: A single-institution retrospective review included patients diagnosed with biopsy-confirmed adenocarcinoma of the duodenum between 2006 and 2021.

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Background: Near-infrared fluorescence imaging using intravenous indocyanine green (ICG) facilitates intraoperative identification of biliary anatomy. We hypothesize that a much lower dose of ICG than the standard decreases hepatic and background fluorescence and improves bile duct visualization.

Study Design: In this multicenter randomized controlled trial, 55 adult patients undergoing laparoscopic cholecystectomy were randomized to low-dose (0.

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Introduction: Pancreaticoduodenectomy (PD) remains a complex surgical procedure with infectious complications affecting nearly 50% of patients. Patients who undergo biliary drainage with stent placement prior to neoadjuvant treatment (NAT) reportedly have higher infection rates following PD. The aim of the current study is to evaluate the differences in postoperative infectious complication rates based on the duration of post operative prophylactic antibiotics in patients with indwelling metal biliary stent who had NAT.

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Background: Pancreatic adenosquamous carcinoma (PASC) is a rare cancer that often presents with advanced disease and carries a grim prognosis. PASC is defined by the presence of at least 30% malignant squamous cells in the presence of malignant ductal adenocarcinoma. The utility of chemotherapy in the setting of metastatic disease is unknown.

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Background: Activities and inhibition of the Renin-Angiotensin-Aldosterone System (RAAS) may affect the survival of resected pancreatic ductal adenocarcinoma (PDAC) patients METHOD: A single-institution retrospective analysis of resected PDAC patients between 2010 and 2019. To estimate the effect of angiotensin system inhibitors (ASIs) on patient survival, we performed Kaplan Meier analysis, Cox Proportional Hazards model, Propensity Score Matching (PSM), and inverse probability weighting (IPW) analysis.

Results: 742 patients were included in the analysis.

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The dynamic regulation of β-cell abundance is poorly understood. Since chromatin remodeling plays critical roles in liver regeneration, these mechanisms could be generally important for regeneration in other tissues. Here, we show that the ARID1A mammalian SWI/SNF complex subunit is a critical regulator of β-cell regeneration.

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Background: The robotic platform is increasingly being utilized in pancreatic surgery, yet its overall merits and putative advantages remain to be adjudicated. We hypothesize that the benefits of minimally invasive pancreatic surgery are maximized in pancreatic benign and premalignant disease, in the setting of friable pancreatic tissue and small pancreatic duct.

Methods: Retrospective analysis of our prospectively maintained pancreatic database of all consecutive patients who underwent pancreaticoduodenectomy (PD) for benign or premalignant conditions between 2010 and 2020.

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