Fig. 3

Afferent Loop Syndrome. Abdominal CT (a, b) of a patient who had received partial gastrectomy with Billroth II reconstruction—A fluid-filled tubular structure in the right upper quadrant and crossing the midline is seen, with associated gallbladder distension (asterisk). There is an enhancing lesion at the anastomosis. This was an afferent loop syndrome caused by gastric tumor recurrence. UGI series of the same patient (c). There is non-filling of the afferent loop (asterisk) and a filling defect at the location of the anastomosis (arrow). Abdominal CT (d, e) of another patient with afferent loop syndrome, because of an internal hernia with volvulus (note the twisted configuration of the bowel loops at the left hypochondrium (arrows)). There is fluid-filled dilatation of the afferent loop associated with gallbladder distension and intrahepatic and extrahepatic duct dilatation (asterisks)