How are extrahepatic causes of biliary obstruction further subdivided?

Updated: Oct 16, 2019
  • Author: Jennifer Lynn Bonheur, MD; Chief Editor: Vinay Kumar Kapoor, MBBS, MS, FRCS, FAMS  more...
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Extrahepatic causes may be further subdivided into those that are intraductal and those that are extraductal.

Intraductal causes include stone disease, neoplasms, biliary stricture, parasites, primary sclerosing cholangitis (PSC), AIDS-related cholangiopathy, and biliary tuberculosis.

Extraductal obstruction caused by external compression of the biliary ducts may be secondary to neoplasms, pancreatitis, or cystic duct stones with subsequent gallbladder distension.

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