[Genetic alterations and molecular mechanisms underlying colorectal tumorigenesis].

Abstract excerpt

Tumor cells are cells that have acquired damage to genes that directly regulate their cell cycles. In the multistep process leading to colorectal carcinoma, the adenoma-carcinoma sequence is characterized by progressive accumulation of genetic abnormalities (K-ras oncogene mutation, allelic deletion on chromosome 5q, 18q, 17p). In a hereditary non-polyposis syndrome (Lynch syndrome II) and in about a quarter of...

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