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What is the most common complication of hepatic hydatid cyst infection?
Rupture into the biliary tree.
CECT abdomen shows a slightly distorted shaped cystic lesion in segment 7 with irregular wall and peripheral enhancement. Interruption of the anterior cyst wall adjacent to a bile duct suggests cystobiliary communication. Coronal images nicely demonstrate the fistulous tract between the cyst to the right subphrenic space suggesting intraperitoneal rupture. Dilatation intra-extrahepatic biliary ducts and a biliary catheter extending from the left bile ducts to the common bile duct were noted. There are intraluminal filling defects and peripheral hypodensities, reflective of thrombophlebitis in right anterior segment of portal vein.