In the department of coloproctology of NORC MH RUz 17 patients with disseminated forms of colorectal cancer was made the study of oncogenes and complex treatment by 2 protocols using FOLFOX4 regime and FOLFIRI regime. In second protocol there used 2 sessions of endolymphatical polychemotherapy FOLFOX4 regime against EHFhyperthermia. All patients were performed additional investigations directed to study the presence of multiple drug resistance in them where definition of р53, bcl2 oncogene expression. In our observations we followed resistance to FOLFOX4 scheme in 4 patients, and to FOLFIRI scheme in 2 cases. In our studies hyperexpression of oncoproteine р53 was correlated with the effect of conducted therapy whereas hyperexpr, Navruzov S. N., Abdujapparov S. B., Pulatov D. A., Islamov H. D., Matniyazova Sh. Ya., Akbarov E. T., and Literatura