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Related Experiment Video

Updated: Aug 11, 2025

Author Spotlight: Genetic Profiling for Fluorouracil Response in Gastric Cancer

Author Spotlight: Genetic Profiling for Fluorouracil Response in Gastric Cancer

Published on: May 10, 2024

Hereditary Diffuse Gastric Cancer.

Lyvianne Decourtye-Espiard¹, Parry Guilford¹

¹Cancer Genetics Laboratory, Centre for Translational Cancer Research (Te Aho Matatū), Department of Biochemistry, University of Otago, Dunedin, New Zealand.

Gastroenterology

|February 5, 2023

Summary

Hereditary diffuse gastric cancer (HDGC) is a genetic syndrome linked to CDH1/CTNNA1 mutations, causing gastric and breast cancers. Management involves genetic testing, surveillance, and prophylactic surgery, with ongoing chemoprevention research.

Keywords:

CDH1 CTNNA1 Cancer Predisposition Hereditary Diffuse Gastric Cancer

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Area of Science:

Genetics and Oncology
Cancer Syndromes
Molecular Pathology

Background:

Hereditary diffuse gastric cancer (HDGC) is an autosomal dominant syndrome predisposing to diffuse gastric cancer (DGC) and lobular breast cancer (LBC).
Germline mutations in CDH1 and CTNNA1, genes encoding components of the epithelial adherens junction complex, are the primary cause of HDGC.
The clinical presentation of HDGC exhibits significant variability in penetrance and phenotype, even within affected families.

Approach:

This review synthesizes current knowledge on HDGC genetics, pathology, and clinical management.
It examines the molecular mechanisms of tumor initiation and the natural history of the disease.
The review covers diagnostic criteria, surveillance strategies, surgical outcomes, and chemoprevention research.

Key Points:

Genetic basis involves CDH1 and CTNNA1 mutations, affecting cell adhesion.
Phenotypic variability and incomplete penetrance complicate diagnosis and management.
Current management focuses on early detection, risk-reducing surgery, and supportive care.

Conclusions:

Accurate genetic testing and risk stratification are crucial for identifying HDGC families.
Multidisciplinary management, including endoscopic surveillance and prophylactic surgery, is essential.
Emerging strategies in chemoprevention offer future therapeutic avenues for HDGC.