• How do Differentiated Tumor Cells Support Cancer Stem Cells?

How do Differentiated Tumor Cells Support Cancer Stem Cells?

Differentiated colorectal cells produce stem cell factor (SCF) to activate KIT signaling in tumor-initiating cells, researchers report in the September issue of Gastroenterology. This pathway maintains the stem-like features of these tumor cells, predominantly under conditions of hypoxia. Colorectal tumors are organized hierarchically and their growth is mediated by an

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  • Should Patients Undergo Endoscopic Sphincterotomy Before Receiving Self-expandable Metallic Stents?

Should Patients Undergo Endoscopic Sphincterotomy Before Receiving Self-expandable Metallic Stents?

Endoscopic sphincterotomy (ES) provides no benefit to patients receiving self-expandable metallic stents (SEMS) for a biliary stricture caused by pancreatic cancer, researchers report in the June issue of Clinical Gastroenterology and Hepatology. The randomized controlled trial showed that ES procedure did not affect number of adverse events, SEMS patency, or

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  • Can Capsule Colonoscopy Accurately Detect Polyps and Adenomas?

Can Capsule Colonoscopy Accurately Detect Polyps and Adenomas?

In an average-risk screening population, capsule colonoscopy identified individuals with polyps and adenomas with high levels of specificity, researchers report in the May issue of Gastroenterology. This procedure might be useful for patients who cannot undergo colonoscopy or who had incomplete colonoscopies. Capsule endoscopy, which involves an ingestible pill-sized endoscope that

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  • What to do About Sessile Serrated Adenomas

What to do About Sessile Serrated Adenomas

Sessile serrated adenomas (SSAs), characterized by the saw-toothed appearance of the colonic crypts, form and progress to colorectal cancers (CRCs) via a different pathway than conventional adenomas and are thought to contribute to 20% to 35% of all cases of CRC. Although little is known about their pathogenesis, endoscopists must be aware of the unique features of SSAs to efficiently detect

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Which Patients With Barrett’s Esophagus Will Develop Esophageal Cancer?

Researchers have found markers to identify patients with Barrett’s esophagus (BE) at greatest risk of developing esophageal adenocarcinoma. These are described in the August issue of Clinical Gastroenterology and Hepatology. In patients with BE, part of the normal stratified squamous epithelium of the lower esophagus is replaced with metaplastic columnar

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What is Intrahepatic Cholangiocarcinoma?

Researchers have found that intrahepatic cholangiocarcinomas (ICCs) are really 2 different groups of tumors, based on molecular and genetic analyses, reported in the April issue of Gastroenterology. These findings identify class-specific mechanisms of oncogenesis that could lead to new treatment approaches for this common liver cancer. Cholangiocarcinoma is the second most

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What are the Risks for Relatives of Patients With Colorectal Cancer?

Close relatives of people with colorectal cancer (CRC) have a significant increase in prevalence of advanced neoplasms and should be screened for cancer, according to the March issue of Gastroenterology. Relatives of patients with CRC have been shown to be at increased risk for colorectal neoplasms, but little is known

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Why Do People Still Develop Colorectal Cancer After Colonoscopy?

Some people who receive screening colonoscopies are still at risk for colorectal cancer (CRC) because neoplastic polyps found are not completely removed, according to the January issue of Gastroenterology. While the quality of colonoscopy examinations has focused on polyp detection, better methods are needed to evaluate polyp removal. The goal

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What Can We Learn from a Pig Model of FAP?

A pig model of intestinal adenoma development, described in the November issue of Gastroenterology, will improve our understanding of colorectal cancer development and could be used to evaluate new therapeutics. Familial adenomatous polyposis (FAP) is an inherited disease; patients develop dysplasias in the colon and rectum that develop to adenomatous

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What are the Barriers to CRC Screening?

Waiving copayments for colonoscopy examinations to detect colorectal cancer (CRC) increases the number of patients that undergo screening, according to a study published in the July issue of Clinical Gastroenterology and Hepatology. Colonoscopy is a recommended, cost-effective method of CRC screening that appears to reduce mortality, yet only half of

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