Figure 18a. Right paraduodenal hernia. (a) Postcontrast CT scan shows an encapsulated bowel loop (arrows) in the Waldeyer fossa. The right colic vein (arrowheads) is displaced anteriorly by the bowel loop. (b) Surgical photograph obtained after withdrawal of the herniated bowel loops shows the hernial hiatus (Waldeyer fossa) (*). Note the congestion of the SBM. PJ = proximal jejunum withdrawn from the sac, T = Treitz ligament.