Abstract

Colorectal carcinogenesis evolves in the results of multi-step genetic differentiation. In the process several chromosomal (5q, 18q,17q) supressor genes deletions and also oncogene (K-ras) activation sequantially observed. In hereditary non-polypoid colorectal carcinoma (HNCC) additional differentiation were observed in chromosome (2p, 3p) the genes related DNA mismatch repair.