NOD2 and inflammatory bowel disease: The main goal of studies included an analysis of molecular-genetic disturbances of frequencies of mutations of genes involved in cancerogenesis like TP53 (rs11540652, rs587782329, COSM10771), MSH2 (rs193922376) and MLH1 (rs63750217) mostly associated with hereditary nonpolyposis cancer and NOD2 gene (rs2066847) involved in lesions of intestine and inflammatory bowel diseases.