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Hereditary diffuse gastric cancer: prophylactic surgical oncology implications
Henry T Lynch1, Edibaldo Silva, Debrah Wirtzfeld
1Department of Preventive Medicine and Public Health, Creighton University School of Medicine, 2500 California Plaza, Omaha, NE 68178, USA.
The Surgical Clinics of North America
|August 2, 2008
Summary
Hereditary diffuse gastric cancer (HDGC) is a genetic condition linked to CDH1 gene mutations. Early detection is challenging, making prophylactic surgery the main option for carriers, despite uncertain risks.
Area of Science:
- Oncology
- Genetics
- Gastroenterology
Background:
- Hereditary diffuse gastric cancer (HDGC) is an autosomal dominant syndrome.
- It is caused by mutations in the E-cadherin gene (CDH1).
- Currently, no effective screening methods exist for early HDGC detection.
Purpose of the Study:
- To summarize the challenges in managing hereditary diffuse gastric cancer.
- To highlight the implications of CDH1 mutations for patient decision-making.
Main Methods:
- Review of current literature on HDGC.
- Analysis of the clinical implications of CDH1 gene mutations.
Main Results:
- Symptomatic HDGC is nearly always fatal.
- Prophylactic total gastrectomy is the only effective option for CDH1 carriers.
- Variable age of onset and reduced penetrance (70%) complicate management decisions.
Conclusions:
- Effective screening for early HDGC remains a significant unmet need.
- Genetic counseling and risk assessment are crucial for CDH1 carriers.
- The decision for prophylactic surgery requires careful consideration of individual risk and penetrance.
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