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Published on: July 28, 2010
Microsatellite instability in gastrointestinal tract tumours
A J Philp1, W A Phillips, S P Rockman
1University of Melbourne, Department of Surgery, Footscray, Victoria, Australia.
International Journal of Surgical Investigation
|April 8, 2003
Summary
Microsatellite instability (MSI) occurs in some gastric and colon tumors. This study found no significant link between MSI and clinicopathological features in these gastrointestinal cancers.
Area of Science:
- Oncology
- Genetics
- Gastroenterology
Background:
- Microsatellite instability (MSI) is a known phenomenon in gastrointestinal tumors, but its clinical significance remains unclear.
- Understanding MSI's role in gastric and colorectal cancers is crucial for potential diagnostic and prognostic applications.
Purpose of the Study:
- To investigate the prevalence of MSI in gastric and colorectal tumors.
- To determine the correlation between MSI status and clinicopathological features in these cancers.
Main Methods:
- Analysis of microsatellite instability (MSI) in 84 gastrointestinal tumors (47 colon, 37 gastric).
- Examination of five different microsatellite loci using normal and tumor DNA from the same patients.
- Collating and comparing clinical features with MSI status.
Main Results:
- High-level MSI (MSI-H) was detected in 13% of colon tumors and 16% of gastric tumors.
- No statistically significant difference in MSI-H frequency was observed between colon and gastric tumors (P = 0.36).
- No significant correlation was found between MSI status and patient age, gender, UICC stage, or tumor differentiation.
Conclusions:
- A subset of sporadic colon and gastric tumors exhibit the MSI-H phenotype.
- The presence of MSI in these gastrointestinal tumors does not appear to be significantly related to the studied clinicopathological characteristics.
