ObjectiveTo investigate the application effect of para-anastomotic shunt stoma in emergency primary resection and entero-anastomosis of left-side obstructive colon cancer.MethodsThe clinical data of 5 patients with left-side obstructive colon cancer who did not meet the endoscopic treatment condition or underwent failed endoscopic treatment in our hospital from Jul. 2019 to Jan. 2022 were analyzed retrospectively. All 5 patients underwent primary resection and entero-anastomosis+para-anastomotic shunt stoma and secondary colostomy closure operation. After the routine transection of the left-side colon, the resected colon specimen was removed; the distal colon port was anastomosed with the proximal colon lateral wall with a circular stapler; the proximal colon opening was pulled out through the original surgical incision or another incision to perform transabdominal wall single-lumen stoma. Stoma closure was completed by removing the colostomy segment with a linear incision closure device 4-8 weeks after the primary operation.ResultsAmong the 5 patients, there were 3 males and 2 females, aged from 37 to 71 years old, with an average age of 56.4 years old. The tumor was located in the splenic curvature of colon in 3 cases, in the middle part of descending colon in 1 case, and in sigmoid colon in 1 case. No anastomotic fistula, abdominal infection, or stoma-related complications occurred in the 5 patients after the primary tumor resection and entero-anastomosis+para-anastomotic shunt stoma. All the secondary stoma closure operations were successful, and there were no complications such as intestinal fistula or incision infection.ConclusionPara-anastomotic shunt stoma is effective, minimally invasive, and easy to operate in emergency primary resection and entero-anastomosis of left-side obstructive colon cancer. It is worth popularizing in clinic.