Publications by authors named "John Mansour"

Background: Compared to open pancreaticoduodenectomies (OPD), the robotic (RPD) approach decreases the rate of complication and the length of stay (LOS). However, it remains unknown if these benefits persist in octogenarians, who are at higher risk for perioperative morbidity and mortality.

Methods: A retrospective analysis of the ACS-NSQIP database was performed to identify patients aged 80 years or older who underwent PD for pancreatic adenocarcinoma between 2015-2021.

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Background: Residence in ethnic enclaves and nativity are both associated with survival in Hispanic patients with cancer, although their prognostic significance in patients with hepatocellular carcinoma (HCC) is unknown. We aimed to determine the association between nativity, neighborhood socioeconomic status (nSES), and ethnic enclave residency with overall survival in Hispanic patients with HCC.

Methods: Hispanic patients diagnosed with HCC from 2004 to 2017 were identified in the Texas Cancer Registry.

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Background: Within the past decade, minimally invasive pancreaticoduodenectomy has been increasingly adopted in high-volume cancer centers. Amid broader trends of a growing older population, the numbers of frail patients with cancer are expected to increase. In this study, we compared the postoperative outcomes of open pancreaticoduodenectomy and minimally invasive pancreaticoduodenectomy in frail patients with pancreatic ductal adenocarcinoma.

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Background: There is an increasing use of neoadjuvant treatment (NAT) for pancreatic cancer (PC) followed by minimally invasive pancreatoduodenectomy (MIPD). We evaluate the impact of the surgical approach on 30-day outcomes in PC patients who underwent NAT.

Methods: Patients with PC who had NAT followed by MIPD or open pancreatoduodenectomy (OPD) were identified from a pancreatectomy-targeted dataset (2014-2020) of the National Surgical Quality Improvement Program.

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Background: Patient- and hospital-level factors associated with outcomes following pancreatoduodenectomy (PD) are well established. However, despite theoretical disruption in hepatopetal flow, the impact of cirrhosis on in-hospital mortality following PD is not well-studied. The objective of this study was to evaluate in-hospital mortality, length of stay (LOS), and post-discharge disposition in patients with cirrhosis undergoing PD.

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Background: We aimed to describe the association of patient-related factors such as race, socioeconomic status, and insurance on failure to rescue (FTR) after hepato-pancreato-biliary (HPB) surgeries.

Methods: Using the National Inpatient Sample, we analyzed 98,788 elective HPB surgeries between 2004 and 2017. Major and minor complications were identified using ICD9/10 codes.

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Article Synopsis
  • - The NCCN Guidelines focus on identifying genetic variants that increase the risk of breast, ovarian, pancreatic, and prostate cancers, specifically targeting genes like BRCA1, BRCA2, and TP53.
  • - The updated guidelines now include a section addressing the needs of transgender, nonbinary, and gender diverse individuals regarding cancer risk reduction strategies.
  • - New criteria for testing and managing TP53 pathogenic variants and related risks of Li-Fraumeni syndrome have also been incorporated into the recommendations.
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Background: Performance of complex cancer surgeries at high-volume (HV) centers has been shown to reduce operative mortality. However, the case volume threshold that should be used to define HV centers is unknown. In this study, we determined thresholds to define HV pancreaticoduodenectomy, esophagectomy, and major lung resection centers based on clinical parameters.

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Article Synopsis
  • The study analyzed 17,071 patients with pancreatic ductal adenocarcinoma (PDAC) to assess how different hospital designations (NCI designated, high volume, safety net, and ACS accredited) relate to guideline-concordant care (GCC) and overall survival.
  • Only 43% of patients received GCC, with NCI hospitals showing the greatest reduction in risk for poor outcomes, followed by high volume hospitals and ACS accredited facilities.
  • The findings suggest that receiving GCC significantly improves survival rates in PDAC patients, and incorporating GCC metrics into hospital accreditation could benefit patient outcomes.
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Introduction: Pancreatic surgery tends to have a high rate of postoperative complications due to its complex nature, significantly increasing hospital costs. Our aim was to describe the true association between complications and hospital costs in a national cohort of US patients.

Methods: The National Inpatient Sample was used to conduct a retrospective analysis of elective pancreatic resections performed between 2004 and 2017, categorizing them based on whether patients experienced major complications (MaC), minor complications (MiC), or no complications (NC).

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  • This study aimed to prospectively evaluate the effectiveness of next-generation sequencing (NGS) on pancreatic cyst fluid in a multi-institutional setting, as previous research had mainly been retrospective or focused on single hospitals.
  • In total, 1933 pancreatic cyst specimens were tested, with 98% being satisfactory for NGS analysis, and findings were correlated with current guidelines and surgical outcomes.
  • Results indicated that mutations such as GNAS had high sensitivity and specificity for diagnosing mucinous cysts and that combining genomic alterations with cytopathologic evaluation significantly improved diagnostic accuracy compared to existing guidelines.
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Introduction: Despite advances, readmission and mortality rates for surgical patients with colon cancer remain high. Prediction models using regression techniques allows for risk stratification to aid periprocedural care. Technological advances have enabled large data to be analyzed using machine learning (ML) algorithms.

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Background: Cardiovascular disease is the most common cause of death among kidney transplant (KT) recipients. Trials routinely exclude patients with end-stage renal disease when assessing the effect of coronary artery revascularization. We looked to compare long-term outcomes in patients who underwent percutaneous coronary intervention (PCI) before KT with those managed medically.

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Background: Lenvatinib is a multitargeted tyrosine kinase inhibitor that is being tested in combination with immune checkpoint inhibitors to treat advanced gastric cancer; however, little data exists regarding the efficacy of lenvatinib monotherapy. Patient-derived xenografts (PDX) are established by engrafting human tumors into immunodeficient mice. The generation of PDXs may be hampered by growth of lymphomas.

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Purpose: Previous studies have shown health disparities among US-Mexico border county (BC) residents. However, the impact of BC residence on gastric cancer treatment and survival outcomes is unknown. Our study compares the receipt of guideline-concordant care (GCC) and survival for patients with gastric cancer by BC status.

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Background: Patients with metastatic hepatocellular carcinoma (HCC) suffer symptoms of both end-stage liver disease and cancer. Palliative care (PC) enhances the quality of life via symptom control and even improves survival for some cancers. Our study characterized rates of PC utilization among metastatic HCC patients and determined factors associated with PC receipt.

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Objective: To determine the surveillance impact of utilizing a discrete field in structured radiology reports in patients with incidental pancreatic findings.

Methods: We implemented a dictation template containing a discrete structured field element to auto-trigger listing of patients with incidental pancreatic findings on a pancreas clinic registry in the electronic health record. We isolated CT and MRI reports with incidental pancreatic findings over a 24-month period.

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Background And Objectives: The clinical presentation of gastric cancer varies between racial and ethnic groups. While historically studied as a monolithic population, the Hispanic ethnicity is comprised of heterogenous groups with considerable biologic, socioeconomic, and cultural variability; therefore, intragroup differences among Hispanic gastric cancer patients may have been overlooked in past research.

Methods: We conducted a retrospective review of the National Cancer Database (NCDB) to compare Hispanic patients with gastric adenocarcinoma diagnosed between 2004 and 2015, by NCDB-reported location of patient ancestry.

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Background: Previous studies have reported healthcare disparities in the Texas-Mexico border population. Our aim was to evaluate treatment utilization and oncologic outcomes of colon cancer patients in this vulnerable population.

Methods: Patients with localized and regional colon cancer (CC) were identified in the Texas Cancer Registry (1995-2016).

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Background: Hepatic angiosarcoma (AS) and hepatic epithelioid hemangioendothelioma (HEHE) are rare primary hepatic vascular malignancies (PHVM) that remain poorly understood. To guide management, we sought to identify factors and trends predicting survival after surgical intervention using a national database.

Materials And Methods: In a retrospective analysis of the National Cancer Database patients with a diagnosis of PHVM were identified.

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Background: Adrenocortical carcinoma (ACC) is a rare but aggressive malignancy, and many prognostic factors that influence survival remain undefined. Individually, the GRAS (Grade, Resection status, Age, and Symptoms of hormone hypersecretion) parameters have demonstrated their prognostic value in ACC. This study aimed to assess the value of a cumulative GRAS score as a prognostic indicator after ACC resection.

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Background: Accurate clinical staging (CS) of gastric cancer is critical for appropriate treatment selection and prognostication, but CS remains highly imprecise. Our study evaluates factors associated with inaccurate CS, the impact of inaccurate CS on outcomes, and utilization of adjuvant therapy in patients who are understaged.

Methods: We conducted a retrospective review of NCDB patients diagnosed with clinical early stage gastric adenocarcinoma (cT1-2N0M0) between 2004 and 2016.

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Purpose: We report long-term outcomes from our phase 1 dose-escalation study to determine the maximum tolerated dose of single-fraction liver SABR pooled with our subsequent single institutional experience with patients treated postprotocol at the highest dose level (40 Gy) established from the phase 1 study.

Methods And Materials: Patients with liver metastases from solid tumors located outside of the central liver zone were treated with single-fraction SABR on a phase 1 dose escalation trial. At least 700 cc of normal liver had to receive <9.

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