Objective: to analyze literature data on the effectiveness of preoperative mechanical bowel preparation (MBP), and on the basis of our own data to perform a comparative analysis of immediate MBP results in patients operated on right-sided colon cancer.Materials and methods. We reviewed literature data relevant to the use of MBP and performed a retrospective analysis of the immediate results of surgical interventions on right-sided colon cancer in 349 patients having undergone MBP with polyethylene glycol (PEG) compounds (n = 186) and without the use of PEG (n = 163).Results. The incidence rates of complications in the patients of groups I and II were 6.7 % and 9.8 % (P>0.05), anastomotic leak rates were 0.6 % and 1.6 % (P>0.05), postoperative death rates — 1.2 % and 1.6 % (P>0.05), the average durations of the postoperative period were 14.9 and 12.1 days, respectively (P>0.05).Conclusion. The use of preoperative MBP with PEG compounds does not result in enhancing the immediate results of the surgical treatment of patients with right-sided cancer.