## Abstract Defects of DNA mismatch repair (MMR) cause the high level microsatellite instability (MSIβH) phenotype. MSIβH cancers may develop either sporadically or in the context of the hereditary nonpolyposis colorectal cancer (HNPCC) syndrome that is caused by germline mutations of MMR genes. In
Subclassification of microsatellite-unstable tumors in colorectal cancer
β Scribed by Nita Ahuja; Stephen B. Baylin
- Book ID
- 107535676
- Publisher
- Current Science Inc.
- Year
- 2007
- Tongue
- English
- Weight
- 265 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1556-3790
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## Abstract Colorectal cancers (CRC) develop through 2 major pathways of genetic instability. In contrast to the majority of CRCs, which are characterized by chromosomal instability, highβlevel microsatellite unstable (MSIβH) CRCs arise as a consequence of the loss of DNA mismatch repair (MMR) func
## Abstract ## BACKGROUND Alterations of __BRAF__ have been implicated in the carcinogenesis of colorectal tumors with microsatellite instability (MSI). These alterations were attributed to defective DNA mismatch repair, which underlies MSI. It was the objective of this study to clarify the role o