Abstract
Gallstones in intrahepatic (N=42 and extrahepatic (N=22) bile ducts and gallbladder (N=23were subjected to chemical analysis modified to suit the analysis of brown pigment stones with the aim of determining if stone location at surgery influenced stone composition. Dimethylsulfoxide—acetone—1 N HCl (90:9:1, v/v/v) was used to dissolve gallstone specimens. Intrahepatic calculi were divided into two groups, ie, nine cholesterol stones and 33 brown pigment stones. Cholesterol stones in the intrahepatic bile ducts had a similar composition to those in the gallbladder and extrahepatic bile ducts, suggesting a similar pathogenesis wherever formed throughout the biliary tract. Intrahepatic brown pigment stones contained significantly less bilirubin (P <0.001) and more cholesterol (P <0.05) by chisquare analysis than brown pigment stones found in the extrahepatic bile ducts, suggesting that the site of formation affects stone composition and modifies stone pathogenesis.
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Yamashita, N., Yanagisawa, J. & Nakayama, F. Composition of intrahepatic calculi. Digest Dis Sci 33, 449–453 (1988). https://doi.org/10.1007/BF01536030
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DOI: https://doi.org/10.1007/BF01536030