Publications by authors named "Hisham Hussan"

Introducing grain legumes, i.e., pulses, into any food pattern effectively increases dietary fiber and other bioactive food components of public health concern; however, the impact depends on the amount consumed.

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Obesity and colorectal cancer are global public health issues, with the prevalence of both conditions increasing over the last 4 decades. In the United States alone, the prevalence of obesity is greater than 40%, and this percentage is projected to increase past 50% by 2030. This review focuses on understanding the association between obesity and the risk of colorectal cancer while also highlighting hypotheses about molecular mechanisms underlying the link between these disease processes.

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Article Synopsis
  • Humans and their microorganisms reside in complex relationships, where research shows that gut microbiota plays a significant role in diseases, including cancer.
  • Specifically, the gut microbiome, particularly colonic bacteria, is linked to colorectal cancer, revealing the presence of harmful microbes that can lead to cancer development.
  • The study emphasizes that dietary choices, especially high-fiber, whole foods, can positively influence the gut ecosystem, promoting health and preventing disease amid rising chronic health issues due to poor dietary habits.
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  • - Determining the best treatment plan for rectal cancer is complicated, involving choices between curative or palliative surgery and considering impact on bowel function and quality of life, especially for distal rectal cancer patients.
  • - Patients with rectal cancer face a higher risk of pelvic recurrence compared to those with colon cancer, making careful patient selection and a multidisciplinary treatment approach essential for better outcomes.
  • - Recent updates to the NCCN Guidelines for Rectal Cancer include new treatment options like endoscopic submucosal dissection for early cases, revisions to the total neoadjuvant therapy strategy, and a nonoperative "watch-and-wait" option for patients who respond well to initial therapy.
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Introduction: Excess body fat elevates colorectal cancer risk. While bariatric surgery (BRS) induces significant weight loss, its effects on the fecal stream and colon biology are poorly understood. Specifically, limited data exist on the impact of bariatric surgery (BRS) on fecal secondary bile acids (BA), including lithocholic acid (LCA), a putative promotor of colorectal carcinogenesis.

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  • Colorectal cancer (CRC) ranks as the fourth most common cancer and the second deadliest in the U.S.
  • Treatment for advanced metastatic CRC includes multiple active drugs used alone or in combination, depending on patient-specific factors.
  • The paper reviews the systemic therapy recommendations for metastatic CRC as outlined in the NCCN Guidelines for Colon Cancer.
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  • Obesity exacerbates gastrointestinal issues, and bariatric surgeries like vertical sleeve gastrectomy (VSG) and Roux-en-Y gastric bypass (RYGB) significantly alter the gastrointestinal system, with unclear effects on hospital admissions for gastrointestinal problems following the procedures.
  • Analyzing data from the Nationwide Readmission Database, the study focused on adults who underwent these surgeries and compared gastrointestinal admissions in the six months post-surgery to the six months prior, controlling for other variables.
  • Results showed higher rates of complications, especially after RYGB, with significant risks of specific conditions like obstruction and infections, while VSG patients faced increased risk of acute pancreatitis; no such increase was seen for those undergoing hernia repair.
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Background: The incidence of early-onset obesity-related cancers (diagnosed < 50 years) is increasing in the U.S. We examined the reported historical body mass index (BMI) of adults with early and later-onset cancers to explore relation to obesity.

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  • The study investigated how bariatric surgery (BRS) affects the development of colorectal polyps, focusing on differences between males and females.
  • It included a large cohort of over 281,000 adults and compared polyp rates before and after BRS and severe obesity (SO) diagnoses, controlling for various health factors.
  • Results showed no significant change in polyp risk after BRS for either sex, but obesity led to higher polyp risk, which decreased post-surgery, indicating that BRS may reduce obesity-related colorectal cancer risks.
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Despite improved cardiometabolic outcomes following bariatric surgery, its long-term impact on colorectal cancer (CRC) risk remains uncertain. In parallel, the influence of bariatric surgery on the host microbiome and relationships with disease outcomes is beginning to be appreciated. Therefore, we investigated the impact of Roux-en-Y gastric bypass (RYGB) and vertical sleeve gastrectomy (VSG) on the patterns of sulfide-reducing and butyrate-producing bacteria, which are hypothesized to modulate CRC risk after bariatric surgery.

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While diet and nutrition are modifiable risk factors for many chronic and infectious diseases, their role in cancer prevention and control remains under investigation. The lack of clarity of some diet-cancer relationships reflects the ongoing debate about the relative contribution of genetic factors, environmental exposures, and replicative errors in stem cell division as determinate drivers of cancer risk. In addition, dietary guidance has often been based upon research assuming that the effects of diet and nutrition on carcinogenesis would be uniform across populations and for various tumor types arising in a specific organ, i.

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  • The NCCN Clinical Practice Guidelines outline the management of squamous cell anal carcinoma, emphasizing a multidisciplinary approach involving various medical specialties.
  • Primary treatment for anal and perianal cancers typically involves chemoradiation, and regular follow-ups are crucial for detecting any recurrence.
  • Recent updates to the guidelines have refined staging classifications and systemic therapy recommendations based on new research, improving treatment strategies for metastatic anal carcinoma.
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Patients with prior colorectal polyps are at high risk for metachronous colorectal neoplasia, especially in the presence of obesity. We assessed the impact of 2 common bariatric surgeries, vertical sleeve gastrectomy and roux-n-Y gastric bypass, on the risk of colorectal neoplasia recurrence. This nationally representative analysis included 1183 postbariatric adults and 3193 propensity score-matched controls, who all had prior colonoscopy with polyps and polypectomy.

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Introduction: Intragastric balloons (IGBs) are a safe and effective treatment for obesity. However, limited knowledge exists on the underlying biological changes with IGB placement.

Methods: This single-institution study was part of an adjustable IGB randomized controlled trial.

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  • This study investigates how obesity and sex influence colorectal cancer (CRC) risk after bariatric surgery, using a large US database from 2012-2020 for analysis.
  • The findings reveal that while females show a reduced CRC risk after Roux-en-Y gastric bypass (RYGB), males have an almost significant increase in CRC risk post-surgery, particularly for rectosigmoid cancer.
  • The results indicate the need for further research to understand why male and female patients experience different CRC risks after undergoing bariatric procedures, as diabetes remission did not lower CRC risk.
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Background: Colorectal cancer incidence is rising in adults < 50 years old, possibly due to obesity. Non-malignant colorectal conditions are understudied in this population. We hypothesize that developing severe obesity in young adulthood also corresponds with increased hospitalization rates for non-malignant colorectal conditions.

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Background And Aims: The incidence of colorectal cancer (CRC) is increasing in adults younger than 50, and early screening remains challenging due to cost and under-utilization. To identify individuals aged 35-50 years who may benefit from early screening, we developed a prediction model using machine learning and electronic health record (EHR)-derived factors.

Methods: We enrolled 3,116 adults aged 35-50 at average-risk for CRC and underwent colonoscopy between 2017-2020 at a single center.

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Background: Accurate detection of gastric antral vascular ectasia (GAVE) is critical for proper management of cirrhosis-related gastrointestinal bleeding. However, endoscopic diagnosis of GAVE can be challenging when GAVE overlaps with severe portal hypertensive gastropathy (PHG).

Aim: To determine the added diagnostic value of virtual chromoendoscopy to high definition white light for real-time endoscopic diagnosis of GAVE and PHG.

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Background: Intragastric balloons are anatomy-preserving, minimally invasive obesity therapies. Enhanced tolerance and durability could help broaden clinical adoption. We investigated the safety and efficacy of an adjustable intragastric balloon (aIGB) in adults with obesity.

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Purpose: Clinically severe obesity (SO) is a known risk factor for worsened outcomes and recurrence of acute diverticulitis. Paucity of data exist on outcomes of diverticulitis after bariatric surgery.

Methods: The Nationwide Readmissions Database was queried for diverticulitis hospitalizations between the years 2010 and 2014.

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Dietary patterns promoting hyperinsulinemia and chronic inflammation, including the empirical dietary index for hyperinsulinemia (EDIH) and empirical dietary inflammatory pattern (EDIP), have been shown to strongly influence risk of weight gain, type 2 diabetes, cardiovascular disease, and cancer. EDIH was developed using plasma C-peptide, whereas EDIP was based on plasma C-reactive protein (CRP), interleukin-6, and tumor necrosis factor alpha receptor 2 (TNF-αR2). We investigated whether these dietary patterns were associated with a broader range of relevant biomarkers not previously tested.

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Article Synopsis
  • - Bariatric surgery (BS) is safe for carefully selected patients with compensated cirrhosis, but there's limited data on how different BS types affect outcomes and healthcare use.
  • - This study analyzed data from 3032 obese adults with compensated cirrhosis who underwent either Roux-en-Y (RYGB) or laparoscopic sleeve gastrectomy (LSG), finding no significant differences in complications or decompensation rates between the two surgeries.
  • - RYGB resulted in higher healthcare utilization in terms of hospital stay length, readmission rates, and costs compared to LSG, suggesting that LSG may be a better option for these patients, but further research is needed to confirm these findings.
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Introduction: Despite the increasing availability of advanced endoscopic resections and its favorable safety profile, surgery for nonmalignant colorectal polyps has continually increased. We sought to evaluate readmission rates and outcomes of elective surgery for nonmalignant colorectal polyps on a national level in the United States.

Methods: The Nationwide Readmissions Database (2010-2014 [International Classification of Diseases, Ninth Revision] and 2016-2018 [International Classification of Diseases, 10th Revision]) was used to identify all adult subjects (age ≥18 years) who underwent elective surgical resection of nonmalignant colorectal polyps.

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  • GI and liver diseases are a significant burden on the healthcare system, contributing to high rates of hospitalizations, costs, and mortality in the U.S.
  • The study analyzed data from 2.4 million hospital admissions for the 13 most common GI conditions, revealing a 30-day readmission rate of up to 25.4% for chronic liver disease and substantial hospitalization costs totaling about $25 billion.
  • Key factors associated with higher 30-day readmission rates included having Medicare/Medicaid, more than three comorbidities, and longer hospital stays, with a notable correlation between readmission and subsequent mortality.
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