Phenotypic diversity in patients with multiple serrated polyps: a genetics clinic study
Daniel D Buchanan1, Kevin Sweet, Musa Drini
1Familial Cancer Laboratory, QIMR, Herston, Brisbane Q 4006, Australia.
International Journal of Colorectal Disease
|March 10, 2010
Summary
Multiple serrated polyps increase colorectal cancer risk, especially in males with no family history. This finding suggests varied genetic causes for this condition, guiding future gene discovery research.
Area of Science:
- Gastroenterology
- Genetics
- Oncology
Background:
- Hyperplastic polyposis is a colonic condition with unknown causes.
- Understanding phenotypic variation in patients with multiple serrated polyps is crucial for gene discovery.
Purpose of the Study:
- To examine the phenotypic variation in patients with multiple serrated polyps.
- To lay the groundwork for gene discovery in hyperplastic polyposis.
Main Methods:
- Recruited 126 patients with at least 5 serrated polyps.
- Collected data on polyp counts, ethnicity, family cancer history, and ascertainment status.
Main Results:
- 41% of patients had colorectal cancer (CRC), with 28% having multiple CRCs.
- Higher polyp counts were linked to male gender and younger onset.
- Dense polyposis (≥80 polyps) was associated with male gender and no family history of CRC.
Conclusions:
- Multiple serrated polyps are linked to increased personal CRC risk.
- A subset of patients with high polyp counts suggests heterogeneous inheritance patterns.
- Findings have implications for genetic studies of multiple serrated polyps.
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