MSI STATUS OF COLORECTAL ADENOCARCINOMA IN STAGE I-II
Main Article Content
Abstract
Background: Microsatellite instability status (MSI) has been identified as a reliable prognostic indicator in stage I-II CRC, with an additional role in predicting the lack of benefit of 5-FU-based adjuvant chemotherapy. Purpose: To review some relationships between MSI status, clinical patterns and stages, pathological characteristics in colorectal cancer. Methods: 53 patients were diagnosed as colorectal adenocarcinoma in stage I-II that are evaluated by pathological features, and IHC stain with MLH1, MSH2, MSH6, PMS2. Results: MSI-H tumors had a higher incidence than MSS / MSI-L tumors in stage I and lower in stage II (32.2; 68.8 vs. 24.3; 75.7% respectively). Conclusion: MSI-H CRCs has a higher incidence than MSS / MSI-L tumors in stage I and lower in stage II. In which, the LS pattern has a high rate in stage II and the lowest in stage I.
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Keywords
MSI, Histopathology and Immunohistochemistry
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