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Jaundice is a condition characterized by the yellowing of the skin and eyes due to an accumulation of bilirubin in the bloodstream. This can occur when there is a disruption in the normal metabolism, processing, or excretion of bilirubin. Biliary obstruction is a common cause of jaundice because it prevents the free flow of bile from the liver to the intestines. This obstruction can result from gallstones, tumors, or strictures in the bile ducts, leading to elevated bilirubin levels in the blood.

While conditions such as hepatitis and cirrhosis can also cause jaundice due to liver dysfunction and the subsequent inability to process bilirubin properly, the option indicating biliary obstruction specifically highlights a mechanical issue that directly impedes bile flow. This can result in conjugated hyperbilirubinemia, manifesting clinically as jaundice. Portal hypertension, although it can be associated with liver disease, is not directly linked to the jaundice that results from obstruction of bile flow.

Understanding the mechanisms behind these conditions helps clarify why biliary obstruction is specifically recognized in connection with jaundice.