case_images: PMC3014833_01
case_images: Abdominal ultrasound showing a dilated common bile duct (11 mm).
case_images: CRIM2010-527141.001.jpg
case_images: PMC3014833_01_CRIM2010-527141.001.jpg
case_images: fig1
case_images: MRCP slice showing an air-fluid filled cyst (arrowed) posterior to the head of the pancreas.
case_images: CRIM2010-527141.002.jpg
case_images: PMC3014833_01_CRIM2010-527141.002.jpg
case_images: fig2
case_images: In addition, it revealed a "curious" cystic lesion, with an air-fluid level, lying posterior to the head of the pancreas at the level of the distal common bile and pancreatic duct, which appeared to be causing some extrinsic compression (Figure 2). 
case_images: CT scan slice showing the air-fluid filled cyst.
case_images: CRIM2010-527141.003.jpg
case_images: PMC3014833_01_CRIM2010-527141.003.jpg
case_images: fig3
case_images: This showed a cystic or necrotic mass behind the head of the pancreas, representing an inflammatory lesion, phlegmon, or duodenal diverticular abscess (Figure 3).
case_images: Images from the ERCP showing a duodenal ulcer which was draining pus and bile.
case_images: CRIM2010-527141.004.jpg
case_images: PMC3014833_01_CRIM2010-527141.004.jpg
case_images: fig4
case_images: An ERCP on her sixth day postadmission revealed a 10 cm duodenal diverticular abscess draining pus and bile, at the level of the major papilla (Figure 4).