Alternative definition : KEGG: Classically, colorectal cancer (CRC) has been believed to develop from normal
mucosa through the premalignant adenoma by the step-wise accumulation of mutations.
All CRC display either microsatellite instability (MSI) or chromosome instability
(CIN). MSI occurs in 15% of colon cancers and results from inactivation of the DNA
mismatch repair (MMR) system by either MMR gene mutations or hypermethylation of the
MLH1 promoter. MSI promotes tumorigenesis through generating mutations in target genes
that possess coding microsatellite repeats, such as beta-catenin, TGFBR2 and BAX.
CIN is found in the majority of colon cancers and leads to a different pattern of
gene alterations that contribute to tumor formation. Genes involved in CIN are those
coding for APC, K-ras, SMAD4 and p53.;
https://www.who.int/fr/news-room/fact-sheets/detail/colorectal-cancer 2023 Switzerland scientific and technical information popular works malignant neoplasm colon/rectum Colorectal Carcinoma Colorectal Cancer Colorectal Cancer Pathway colorectal neoplasms neoplasm, malignant NCI CTEP SDC Colorectal Cancer Sub-Category Terminology