Fig. 3
From: Validity of MDCT cholangiography in differentiating benign and malignant biliary obstruction
Post-ERCP duodenal diverticulum. Benign obstructive jaundice with moderate IHBRD and pneumobilia caused by a duodenal diverticulum arising from the third part of the duodenum following iatrogenic ERCP trauma. "Male patient 58 years old presented by epigastric pain and progressive jaundice. (History of ERCP two months ago). a, b Axial pre-contrast and portal phase images showing mild to moderate pneumobilia more prominent at the LT hepatic lobe. c Coronal portal phase image showing dilated CBD with free air inside. d Axial oblique reformatted post-contrast (portal venous phase) image showing dilated CBD with air inside and posterior to it a cystic lesion with air fluid level within. e Coronal oblique reformatted post-contrast (portal venous phase) MDCT cholangiography image showing cystic lesion assuming a medial location to the second part of the duodenum and superior location to the 3rd part of the duodenum which is being continuous inferiorly via a wide isthmus. f Sagittal oblique reformatted MDCT cholangiography image showing the relation of the cystic lesion to the CBD (posterior to it) and the third part of the duodenum (superior to it)