Transmesosigmoid Hernia Presenting with Small Bowel Obstruction: Case Report and Results of Literature Review

Internal hernias account for 1% to 6% of small bowel obstructions. The most common types of internal hernias include paraduodenal, transomental, transmesenteric, retro-anastomotic, and foramen of Winslow hernias. Among these, transmesosigmoid hernia, as seen in the presented case, causes small bowel obstruction in approximately 6% of internal hernias. In transmesosigmoid hernias, there is a full-thickness defect on both peritoneal surfaces of the mesocolon, and strangulation is common. Diagnosis is typically made through physical examination and imaging modalities. In this case, a transmesosigmoid hernia that presented to the clinic with symptoms of ileus will be presented, and the relevant literature on the subject will be discussed.