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Current Treatment Options in Gastroenterology
Erschienen in: Current Treatment Options in Gastroenterology 4/2019

18.11.2019 | Genetics in Gastroenterology Practice (B Katona, Section Editor)

Incorporating Colorectal Cancer Genetic Risk Assessment into Gastroenterology Practice

verfasst von: Benjamin Stern, DO, Thomas McGarrity, MD, Maria Baker, PhD, MS

Erschienen in: Current Treatment Options in Gastroenterology | Ausgabe 4/2019

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Abstract

Purpose of review

Decades have passed since the underlying molecular etiologies of the most common hereditary forms of colorectal cancer (CRC), Lynch syndrome, and familial adenomatous polyposis (FAP) were first described. With the advent of next-generation sequencing (NGS) panels, the landscape of hereditary CRC testing has changed dramatically. We review available screening strategies, novel CRC predisposition genes, and challenges and opportunities in this field.

Recent findings

Improved sensitivity and availability of NGS panel testing have greatly expanded our understanding regarding the number of CRC syndromes and their phenotypic expression. A variety of screening strategies are available to identify heritable CRC syndromes, potentially decreasing morbidity and mortality in this population. However, these screening strategies remain imperfect and present challenges regarding their implementation in clinical practice. Screening strategies include universal screening of CRC tumors for Lynch syndrome, clinical prediction algorithms, and risk assessment questionnaires. Additionally, there remains a gap in our understanding of the clinical implications of novel gene mutations of variable penetrance and unexpected NGS panel test results. Incorporation of single nucleotide polymorphisms (SNPs) may help to further refine cancer risk assessment, and the clinical introduction of RNA analysis may allow us to clarify variants of unknown significance (VUSs) and identify deep intronic mutations that would otherwise be missed.

Summary

Recognition of genetic predisposition to CRC is critical for the practicing gastroenterologist. The evolving field of cancer genetics offers great challenges and opportunities for improved CRC management.
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Metadaten
Titel
Incorporating Colorectal Cancer Genetic Risk Assessment into Gastroenterology Practice
verfasst von
Benjamin Stern, DO
Thomas McGarrity, MD
Maria Baker, PhD, MS
Publikationsdatum
18.11.2019
Verlag
Springer US
Erschienen in
Current Treatment Options in Gastroenterology / Ausgabe 4/2019
Print ISSN: 1092-8472
Elektronische ISSN: 1534-309X
DOI
https://doi.org/10.1007/s11938-019-00267-w

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