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Gastrointestinal polyposis syndromes for the general gastroenterologist
Joanna J Hurley1,2, Iain Ewing3, Julian R Sampson2
1Department of Gastroenterology, University Hospital Llandough, Penarth, UK.
Insights
Inheritable gastrointestinal polyposis syndromes, characterized by numerous colon polyps or early-onset colorectal cancer, require careful diagnosis. This review covers key diagnostic features, genetic factors, and management for common polyposis conditions like familial adenomatous polyposis (FAP).
Area of Science:
- Gastroenterology
- Clinical Genetics
- Oncology
Background:
- Colonic polyps are common, but numerous adenomas or early-onset polyps suggest inheritable polyposis syndromes.
- Patients may be identified through colonoscopy, personal cancer diagnosis, or family screening.
- Early recognition of inheritable polyposis is crucial for timely intervention and management.
Purpose of the Study:
- To outline diagnostic considerations and key features for identifying polyposis syndromes.
- To describe the genetic underpinnings of common polyposis conditions.
- To detail the management strategies for various inherited polyposis syndromes.
Main Methods:
- Review of diagnostic criteria and clinical presentations of polyposis syndromes.
- Analysis of genetic factors associated with common inheritable gastrointestinal polyposis.
- Description of management protocols for identified polyposis conditions.
Main Results:
- Identified key diagnostic indicators for differentiating common polyposis syndromes.
- Detailed the genetic basis for conditions including familial adenomatous polyposis (FAP), MUTYH-associated polyposis, Peutz-Jeghers syndrome, juvenile polyposis syndrome, Cowden syndrome, and serrated polyposis.
- Outlined distinct management pathways tailored to each specific polyposis syndrome.
Conclusions:
- Accurate diagnosis of inheritable polyposis syndromes relies on recognizing specific clinical and genetic features.
- Understanding the genetic landscape of polyposis is essential for effective patient management and risk stratification.
- Tailored management strategies are critical for improving outcomes in patients with various polyposis syndromes.
Abstract:
The occurrence of colonic polyps is a common phenomenon; however, where there are numerous adenomas or other polyps, and/or the patient is at a relatively young age, an inheritable form of gastrointestinal polyposis should be considered. Patients can present via different referral routes, for example, at colonoscopy where multiple polyps are detected, following a personal diagnosis of colorectal cancer, or by family screening. This article outlines the important considerations in the diagnosis of a polyposis syndrome and key diagnostic features to consider. It will also describe the underlying genetic factors associated with the common polyposis syndromes, including classical familial adenomatous polyposis (FAP), attenuated FAP, MUTYH-associated adenomatous polyposis, Peutz-Jeghers syndrome, juvenile polyposis syndrome, Cowden syndrome and serrated polyposis, and the subsequent management of each condition.
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