[Does the Sidedness of Perforative Colorectal Cancer Influence the Prognosis of Patients ?].

We examined the influence of the sidedness of the primary tumor on survival of patients with colon cancer perforation. The subjects of this retrospective study were 52 patients who underwent surgery for colon perforation between April 2005 and December 2016 at our institution and survived more than 30 days. Patients with perforation of the oral side of the tumor were included. The background data and survival times were compared between 9 patients whose primary tumors were located in the cecum, ascending colon, or transverse colon(right-side group)and 43 patients whose primary tumors were located in the descending colon, sigmoid colon, or rectum(left-side group). There was no significant difference in terms of age, sex, Stage, or rate of chemotherapy, but Hinchey stage was significantly higher in the left-side group(p<0.05). The median survival time tended to be longer in the left-side group(68.2 months vs 21.2 months, p=0.05). These results suggest that right-side perforation might cause a poorer prognosis than left-side perforation in patients with perforative colorectal cancer.