Publications by authors named "Eleazar Montalvan-Sanchez"

Objective: To investigate how individual social determinants of health (SDOH) and cumulative social disadvantage (CSD) affect survival and receipt of liver transplant (LT) in patients with hepatocellular carcinoma (HCC).

Methods: We enrolled 139 adult patients from two Indianapolis hospital systems between June 2019 and April 2022. Structured questionnaires collected SDOH and social risk factor data.

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  • The study investigates how an artificial intelligence (AI) tool improves the detection of colorectal polyps during colonoscopy, particularly for patients with poor bowel preparation.
  • Using a case-control design and propensity score matching, researchers analyzed data from 2017 to 2023 to compare colonoscopies performed with and without AI assistance.
  • Results show that AI significantly increased the detection rates of various types of polyps, especially in patients with inadequate preparation, highlighting its potential role in enhancing colonoscopy outcomes.
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  • Gastric adenocarcinoma (GAC) is a leading cause of cancer deaths globally, especially prevalent in areas like Latin America and Eastern Asia, with significantly higher rates seen in non-White populations in the U.S.
  • A phase II clinical trial investigated the effectiveness of a curcuminoid preparation on patients with high-risk gastric premalignant conditions, addressing a significant gap in GAC chemoprevention research.
  • The study faced challenges such as regulatory hurdles, recruitment issues in Honduras, and disruptions from the COVID-19 pandemic and natural disasters, yet it highlights the importance of international collaborations for cancer prevention in underserved Latino populations.
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Emerging evidence suggests a broader spectrum of celiac disease (CeD) system involvement, including neurological manifestations. We aimed to conduct a systematic review and meta-analysis of the available evidence from studies assessing the association of cognitive impairment and insomnia with CeD. A total of 259 participants with CeD were included in the studies investigating insomnia and 179 were included in studies investigating cognitive impairment.

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Background: Gastric adenocarcinoma is the fourth leading cause of global cancer mortality and leading infection-associated cancer. Gastric cancer has significant geographic variability, with a high incidence in East Asia and mountainous regions of Latin America. In the United States, gastric cancer represents a marked disparity with incidence rates that are two to three times higher in Hispanics compared to non-Hispanic Whites.

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Background: Two-thirds of global cancers occur in low/middle income countries (LMIC). Northern Central America is the largest LMIC region in the Western Hemisphere and lack cancer registries to guide cancer control. We conducted a gastric cancer survival study in rural Western Honduras, characterized as having among the highest gastric cancer incidence rates in Latin America.

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Background: Gastric adenocarcinoma is the fourth leading cause of cancer-related mortality and leading infection-associated cancer. Gastric adenocarcinoma has striking geographic variability, with high incidence in East Asia and mountainous Latin America. Reliable cancer data and population-based cancer registries are lacking for the majority of low- and middle-income countries, including the Central American Four region (CA-4, Nicaragua, El Salvador, Honduras, and Guatemala).

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Objective: To determine the prevalence of obesity and metabolic syndrome (MS) in the population older than 45 years in rural Western Honduras and contribute to the limited literature on MS in Central America.

Methods: Descriptive cross-sectional study conducted in the District of Copan. The study includes 382 men and women aged 45 to 75 years.

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Background: Celiac disease (CeD) is an immune-mediated disorder affecting the small bowel, associated with genetic factors and increasing global prevalence.

Aim: This study explores the association between CeD, Systemic Lupus Erythematosus (SLE), primary Sjogren syndrome (pSS), and Systemic Sclerosis (SSc).

Methods: A systematic review and meta-analysis were conducted following PRISMA guidelines.

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The significant global burden of colorectal cancer accentuates disparities in access to preventive healthcare in most low- and middle-income countries (LMICs) as well as large sections of underserved populations within high-income countries. The barriers to colorectal cancer screening in economically transitioning Latin America are multiple. At the same time, immigration from these countries to the USA continues to increase.

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Importance: Colorectal cancer (CRC) is a leading cause of cancer-related mortality globally, with increasing incidence and mortality in Latin America. CRC screening programs can reduce disease burden, but information on screening programs in Latin America is limited.

Objective: To describe characteristics (eg, type of program, uptake, neoplastic yield) of CRC screening programs in Latin America.

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  • The study focused on the impact of COVID-19 in Honduras, examining the clinical characteristics and outcomes of hospitalized patients during a significant outbreak from October 2020 to March 2021.
  • A total of 929 cases were analyzed, revealing a high case fatality rate of 50.1%, with patients suffering from comorbidities facing increased mortality risks.
  • Limited ICU capacity meant that only a fraction of patients requiring critical care were admitted, and those who did not receive appropriate care had a much lower chance of survival compared to those who did.
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Biomass cookstove food preparation is linked to aero-digestive cancers, mediated by ingested and inhaled carcinogens (e.g., heterocyclic amines, and polycyclic aromatic hydrocarbons).

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Introduction: Peptic ulcers with adherent clots are associated with a high-risk of rebleeding and mortality. However, the optimal management of bleeding ulcers with adherent clots remains unclear. We conducted this systematic review and meta-analysis to compare endoscopic therapy and conservative therapy to manage bleeding ulcers with adherent clots.

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The internet has become a necessary communication platform for health information. The quality of online material for patients varies significantly, and this is not different for material on gastrointestinal cancers. We aimed to assess English and Spanish online patient information addressing esophageal, gastric, and colorectal cancer treatment.

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Background: Lumen-apposing metal stents (LAMSs) are often used to drain pancreatic fluid collections (PFCs). However, adverse events, such as stent obstruction, infection, or bleeding, have been reported. Concurrent double-pigtail plastic stent (DPPS) deployment has been suggested to prevent these adverse events.

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To compare the clinical outcomes of a low dose dexamethasone strategy vs. a high-dose dexamethasone strategy in hypoxemic COVID-19 patients. A retrospective observational study comparing low-dose (8 mg) and high-dose dexamethasone (24 mg) of COVID-19 patients admitted from September 1, 2020 to October 31, 2020 in a hospital in Honduras.

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Aim: We performed a systematic review and meta-analysis to identify the prevalence of small intestinal bacterial overgrowth (SIBO) in patients with gastroparesis.

Background: Several studies have suggested an association between SIBO and gastroparesis, which is characterized by delayed gastric emptying in the absence of mechanical obstruction.

Methods: A comprehensive search was performed using MEDLINE, EMBASE, Scopus and Cochrane Central Register of Controlled Trials (CENTRAL) through January, 2022 for randomized controlled trials and observational studies reporting the prevalence of SIBO in gastroparesis.

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Overlap syndrome (OS) is a term that comprises the presentation of multiple hepatic disease characteristics in the same patient, such as the presence of autoimmune hepatitis (AIH) features in addition to primary sclerosing cholangitis (PSC) or primary biliary cholangitis (PBC). Standard therapy for AIH is immunosuppression, while ursodeoxycholic acid is the preferred treatment for PBC. Additionally, liver transplantation (LT) may be considered in severe cases.

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Introduction: Chronic Pancreatitis (CP) is a fibroinflammatory condition with debilitating symptoms. Quality of life is severely affected in patients with CP and they are likely to suffer from mental health disorders, including depression. We conducted a systematic review and meta-analysis assessing the prevalence of depressive symptoms and depression in patients with CP.

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We describe the case of a 51-year-old man who presented with a palpable purpuric rash and associated four days of lower gastrointestinal bleeding one month after testing positive for COVID-19. Urine studies showed evidence of microscopic hematuria and an increased protein/creatinine ratio. An abdominal computed tomography scan showed distal ileitis, and a skin biopsy was significant for IgA vasculitis.

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Gastric adenocarcinoma (GC) is the fourth leading cause of global cancer mortality, and the leading infection-associated cancer. Helicobacter pylori is the dominant risk factor for GC and classified as an IARC class I carcinogen. Surveillance of gastric premalignant conditions is now indicated in high-risk patients.

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Drug Reaction with Eosinophilia and Systemic Response (DRESS) syndrome is a rare hypersensitivity reaction characterized by rash, fever, lymphadenopathy, and visceral involvement. The liver is frequently involved in DRESS, with increased liver enzymes and hepatomegaly. Over 40 drugs have been implicated in the induction of DRESS, however other illicit substances have also been linked to this.

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We report a case of an 81-year-old male immigrant from a Latin American developing country with a high burden of upper gastrointestinal neoplasms, who presented with a small bowel gastrointestinal stromal tumor (GIST) after 2 years of delay in the diagnosis due to multiple barriers to healthcare. The patient presented with a partial intestinal obstruction in an abdominal computed tomography (CT) scan suggestive of a GIST. Surgical resection was performed, and adjuvant therapy was initiated with imatinib (a tyrosine kinase inhibitor) after the diagnosis was confirmed.

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