How is pneumobilia differentiated from gas in the portal vein?
Gas in the portal vein has a peripheral intrahepatic pattern and gas in the biliary system has a central intrahepatic pattern.
What is Rigler's triad?
Abdominal X-ray signs of small bowel obstruction, pneumobilia, and a radio-opaque gallstone, usually in the right iliac fossa.
What is Rigler's tetrad?
Rigler's triad and a follow-up abdominal x-ray a change in the position of the gallstone.
What is Bouveret's syndrome?
Gastric outlet obstruction due to a gallstone in the pylorus or proximal duodenum.
Low density (80 HU) gallstone within the ileum with proximal small bowel dilatation.
Small gallstones within the gallbladder neck.
Pneumobilia within the cystic duct.
Fistula between the gall bladder and the first part of the duodenum (Cholecystoduodenal fistula).
Incidental two well-circumscribed left breast masses.