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The major subdivisions of the biliary tract are the intrahepatic bile ducts, the common bile duct, and the gallbladder. The major diseases of the extrahepatic biliary system are gallbladder inflammation (cholecystitis, acute or chronic), gallbladder stones, and obstruction to the common bile duct by stones or tumor. Obstruction to intrahepatic bile channels can occur as [...]

Ultrasound has been reported to detect metastatic liver tumor in approximately 85%-90% of patients (literature range, 63%-96%, with some of the lower figures being earlier ones). Computerized tomography (CT) has a sensitivity of 90%-95%. Radionuclide scans detect a few more patients with diffuse liver abnormality than CT or ultrasound. However, CT and ultrasound can differentiate [...]