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[Familial colorectal cancer]
Lone E M Sunde1, Steffen Bülow, Inge T Bernstein
1Arhus Universitetshospital, Arhus Sygehus, Klinisk Genetisk Afdeling, Onkogenetisk Klinik, DK-8000 Arhus C. lsund@as.aaa.dk
Ugeskrift for Laeger
|July 11, 2006
Summary
Hereditary non-polyposis colorectal cancer (HNPCC) is the most common genetic cause of colorectal cancer (CRC). Genetic testing and family history evaluation help identify high-risk individuals for surveillance.
Area of Science:
- Genetics
- Oncology
- Gastroenterology
Context:
- Colorectal cancer (CRC) has various genetic predispositions.
- Hereditary non-polyposis colorectal cancer (HNPCC) is the most frequent monogenic cause.
- Other syndromes involve polyposis, and some families present familial risk without meeting specific syndrome criteria.
Purpose:
- To outline the genetic basis of colorectal cancer risk.
- To describe the approach to genetic testing and risk assessment in families with a history of CRC.
Summary:
- Hereditary non-polyposis colorectal cancer (HNPCC) represents the most common monogenic predisposition to colorectal cancer (CRC).
- Less frequent are polyposis syndromes, and some families exhibit familial CRC risk without fulfilling criteria for known syndromes.
- When causative mutations are identified, predictive genetic testing is offered; otherwise, risk is assessed via family history, leading to surveillance for high-risk individuals.
Impact:
- Informing genetic counseling and clinical management strategies for hereditary colorectal cancer.
- Improving early detection and prevention of colorectal cancer in at-risk families.
- Facilitating personalized risk assessment and surveillance protocols based on genetic findings or family history.