Paraduodenal hernias are uncommon congenital herniations into the mesentery
of the colon that present as small bowel obstruction. The diagnosis is elu
sive but may be made by CT scan or upper gastrointestinal series. There are
three types: left, right, and transverse. The repair involves reduction of
the hernia and closure of the mesenteric defect in accordance with the ana
tomy of the hernia. We present two cases of paraduodenal hernia that are re
presentative of this unusual class of internal herniation.