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19 Cards in this Set
- Front
- Back
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What is the measurement of a dilated main biliary duct
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greater than 6-7mm
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When you see a dilated main biliary duct what should you look for
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distal tapering with a V abrupt cutoff
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What is the measure of a dilated right or left hepatic duct
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greater than 2mm or > than 40% diameter of adjacent PV branch
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What are 8 common causes of biliary duct dilatation
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stricture, stone, cholangitis, pancreatitis
pancreatic Ca, cholangio, ampullary Ca, LAD |
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What are 4 causes of mild obstruction
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stricture, stone, cholangitis, pancreatitis
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What are the causes of marked biliary ductal dilation
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pancreatic Ca, cholangio, ampullary ca, LAD
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What is called when a stone is in the bile duct
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choledocholithiasis
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What is a klatskin tumor
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a cholangiocarcinoma in the hilar region (MC location)
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What are the risk factors for cholangiocarcinoma
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chronic biliary disease
PSC Liver fluke |
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Where is the least common location for cholangiocarcinoma
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intrahepatic (however it is the second most common hepatic tumor)
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What is the US appearance of a intrahepatic cholangiocarcinoma
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hypovascular, hetergeneous, ductal obstruction,
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If a pt with cholangiocarcinoma has distal nodes can you still resect
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no this precludes resection
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What is the common distribution of pneumobilia
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the central portion of the liver
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What is the MC cause of pneumobilia
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biliary interventions
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What are the causes of pneumobilia
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biliary intervention
following passage of a stone emphysematous cholecystitis choledocho-doudenal fistula cholecysto-enteric fistula |
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How does pneumobilia appear on US
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bright linear echogenic structures,
posterior dirty shadowing movement |
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How does portal venous gas look
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it is ill defined and in the periphery
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What is another way to differentiate portal venous gas from pneumobilia
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turn on color doppler and the there will be a portal venous wave form associated with the PV gas
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What is portal venous gas until proven otherwise
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bowel ischemia/infarction
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