What does brown urine mean with cholelathiasis?

Brown urine in the context of cholelithiasis (gallstones) may indicate the presence of bilirubin in the urine, often resulting from liver dysfunction or bile duct obstruction due to a gallstone. When bile flow is disrupted, bilirubin can accumulate in the bloodstream and subsequently be excreted in urine, leading to a darker coloration. This symptom may suggest the need for medical evaluation to assess the extent of the liver or biliary system involvement.