Abstract:Abstract: Objective?To evaluate the surgical technique and clinical effect of modified transabdominal laparoscopic radical operation for upper urinary tract epithelial cancer.?Methods?104 patients with upper urinary tract epithelial cancer from September 2013 to April 2018 were randomly divided into two groups. 51 cases of lateral decubitus position underwent laparoscopic nephrectomy via abdominal approach and then changed to supine position through lower abdominal incision to treat ureterovesical junction and take out specimens (standard group). 53 cases underwent modified transabdominal laparoscopic radical operation for upper urinary tract epithelial cancer (modified group). The operation time, intraoperative blood loss, postoperative pain, hospitalization time, postoperative drainage volume and short-term complication rate were compared between the two groups. Postoperative pain degree was assessed by pain numeric rating scale.?Results?The operation time and hospitalization time of the improved group were shorter than those of the standard group, the difference was statistically significant (P < 0.05). The pain degree of improved group was lighter than standard group after the operation, and the drainage volume was less than standard group after the operation. The difference was statistically significant (P < 0.05). Although the intraoperative blood loss in improved group was less than standard group, there was no significant difference between the two groups (P > 0.05). There were 11 patients with short-term complications in the standard group (21.6%) and 4 patients with short-term complications in the improved group (7.5%), The incidence of short-term complications in improved group was significantly less than conventional group (P < 0.05).?Conclusion?The modified transabdominal laparoscopic radical operation for upper urinary tract epithelial cancer is a safe and effective method, which is worthy of clinical promotion.