Unnoticed small bowel perforation as a complication of lumbar discectomy

Surgery for disc herniation is one of the most common traumas and neurosurgical procedures. Although discectomy has low morbidity, serious intra-abdominal complications can affect retroperitoneal structures, such as the large vessels, small intestine, and ureters.

A 36-year-old woman in uncontrollable pain presented with left sciatic neuralgia in the L5 region. Magnetic resonance imaging revealed an extruded left paracentral hernia at L5-S1. With the patient in the decubitus prone position, trauma surgeons specializing in spine surgery performed an L5-S1 flavectomy and a simple discectomy. Intraoperative complications were not observed. About 4 hours after surgery, the patient reported sharp abdominal pain and had persistent hypotension. Emergency abdominal computed tomography showed hemoperitoneum in the pouch of Douglas and left parietocolic space. Laparoscopic exploration confirmed hemoperitoneum without visible cause, a seton perforation of the small intestine, and a few adhesions in the right iliac fossa that were consequences of previous appendectomy. A laparotomy was then performed. A lesion was discovered in the mesentery of the rectosigmoid junction coinciding with the S5-L1 space. A segmental bowel resection and mechanical side-to-side anastomosis, with drainage, were done. The patient recovered satisfactorily despite a surgical wound infection.

Although bowel perforation after discectomy rarely occurs, spine surgeons must try to prevent them by being more cautious during surgery. General surgeons must be highly suspicious of the presence of an intra-abdominal complication when there are signs and symptoms of a postoperative acute abdomen.