To study the potentialities of CT in the diagnosis of recurrent cancer of the large bowel, 325 patients underwent various surgical interventions for colorectal carcinoma were examined. The surgery-CT study interval ranged from 2.5 months to 11 years. It was found that CT might detect various intra- and extraintestinal relapses and generalization a tumorous process. With this, the efficiency of CT is higher than that of other diagnostic tools in the detection of extraintestinal relapses and generalization the tumorous process. To timely reveal a relapse, the CT interval should exceed 4-5 months.