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Evolution of hereditary bowel cancer
1Department of Pathology, School of Medicine, University of Auckland, New Zealand.
Mutation Research
|November 1, 1993
Summary
Familial adenomatous polyposis (FAP) and hereditary non-polyposis colorectal cancer (HNPCC) are distinct inherited bowel cancers. Understanding their genetic differences could lead to new cancer prevention strategies targeting early neoplastic development.
Area of Science:
- Gastroenterology
- Oncology
- Genetics
Background:
- Familial adenomatous polyposis (FAP) and hereditary non-polyposis colorectal cancer (HNPCC) are autosomal dominant inherited conditions predisposing to colorectal adenomas.
- Despite shared predisposition, FAP and HNPCC exhibit significant clinical, pathological, and molecular genetic distinctions.
Purpose of the Study:
- To critically compare the neoplastic evolution processes in FAP and HNPCC.
- To elucidate the earliest tissue manifestation in FAP.
- To explore the implications for future cancer prevention strategies.
Main Methods:
- Comparative analysis of clinical, pathological, and molecular genetic data for FAP and HNPCC.
- Critical review of existing literature on neoplastic development in hereditary colorectal cancers.
Main Results:
- The unicryptal adenoma is proposed as the initial tissue manifestation of FAP.
- Evidence for a preceding field change characterized by diffuse hyperproliferation in FAP is critically evaluated and found lacking.
- Detailed comparison of neoplastic evolution pathways in FAP and HNPCC is presented.
Conclusions:
- FAP and HNPCC represent distinct pathways of hereditary colorectal cancer development.
- Understanding the functions of FAP and HNPCC genes is crucial.
- This knowledge may enable the development of targeted cancer prevention strategies focused on early neoplastic stages.