Abstract:Abstract: Objective?To investigate the effects of laparoscopic colorectal cancer surgery on serum miR-17, miR-21, miR-20a and miR-92 levels.?Methods?120 patients with colorectal cancer from June 2015 to June 2018 were enrolled in the study. Real-time quantitative PCR (RT-qPCR) was used to detect miR-17, miR-21, miR-20a and miR-92 levels in serum. The QLQ-C30 score was used to assess the condition of patients before and after laparoscopic colorectal surgery.?Results?After laparoscopic colorectal cancer surgery, the body score, cognitive score, emotional score, role score and social function score were significantly improved; The miR-17, miR-21, miR-20a and miR-92 in serum decreased significantly. Correlation analysis showed that the relative changes of miR-17, miR-20a and miR-92 were correlated with the change of QLQ-C30 score (P < 0.05), while miR-21 was not (P > 0.05).?Conclusion?The serum level of miR-17, miR-20a and miR-92 in patients with laparoscopic colorectal cancer can be used as a potential marker to evaluate the therapeutic effect.