Peri-ampullary duodenal diverticulum: effect on extrahepatic bile duct dilatation after cholecystectomy

• Published in: Clinical radiology 2019-09, Vol.74 (9), p.735.e15-735.e22
• Main Authors: Ham, J.H., Yu, J.-S., Choi, J.M., Cho, E.-S., Kim, J.H., Chung, J.-J.
• Format: Article
• Language: English
• ISSN: 0009-9260; 1365-229X
• DOI: 10.1016/j.crad.2019.05.031

To investigate the effect of peri-ampullary duodenal diverticula (PAD) on extrahepatic bile duct (EHBD) dilatation before and after cholecystectomy. During a 5-year period, a total of 860 consecutive patients with prior cholecystectomy were examined using abdominal computed tomography (CT). After exclusion of those with other obstructive EHBD lesions, 61 patients with PAD were recruited for evaluation of EHBD dilatation before and after cholecystectomy and were compared with a randomly sampled control group (n=113) without PAD. EHBD diameter was measured on coronal reconstruction CT using electronic callipers on the picture archiving and communication system monitors by two reviewers in consensus. There was no significant difference in EHBD diameter between PAD and non-PAD groups (8.2±2.8 versus 7.8±2.3 mm; p=0.276) before cholecystectomy. Compared with preoperative diameter, EHBD was significantly dilated after cholecystectomy (7.9±2.5 versus 9.8±3.4 mm, p