Internal Herniation Following Laparoscopic Left Hemicolectomy: An Underreported Event

Abstract

Laparoscopic colorectal surgery creates fewer adhesions compared with open colorectal resection. Small bowel obstruction after laparoscopic colorectal resection may be caused by internal herniation of the small bowel through a colomesenteric defect, probably related to a lack of adhesion formation. This is seen especially after left colonic resections. A literature review was conducted using the key words "intestinal obstruction" and "laparoscopic left colonic resection," and 9 documented case reports of obstruction following laparoscopic left colorectal resection were identified. We present 2 additional cases and discuss the etiology, diagnosis, management, and possible options for avoiding this complication. In total, 167 consecutive laparoscopic procedures were performed in our study, and 8 were left hemicolectomies. Four of these patients (50%) developed intestinal obstruction, with 2 requiring surgical intervention for internal hernia. For the remaining 159 colorectal procedures, there were only 2 admissions with intestinal obstruction, with 1 patient requiring surgery (P = .006). Laparoscopic left hemicolectomy carries a significant risk of internal herniation. Performing a laparoscopic subtotal colectomy or fashioning the colocolonic anastomosis through the small bowel mesentery may minimize this risk.