A transmesenteric congenital internal hernia presenting in an adult.

Congenital internal hernias (CIAHs) are a rare cause of small bowel obstruction in adults. We present a case of transmesenteric CIAH in a 32-year-old male. The clinical examination and computed tomography scan were interpreted as intestinal obstruction, and only an emergency laparotomy revealed that 1 m of small bowel herniated through a 2 cm defect in the mesentery of the transverse colon. Repair of the defect was performed using interrupted suturing, and the patient was discharged after 4 days without sequelae.