Figure 22a. Traumatic pharyngeal pseudodiverticulum in a 3-month-old boy who underwent repair of bilateral inguinal hernias at a rural hospital. Endotracheal intubation was reported to have been difficult, and shortly after surgery the patient developed respiratory difficulty. (a) Chest radiograph shows a large cervicothoracic air collection (arrowheads). (b) Esophagogram shows a large, contrast material–filled cavity (arrow) that compresses the esophagus and displaces it anteriorly.