XXXX patterns in hepatolithiasis: a comparative cholangiographic study between Taiwan and Japan.

@entity1 @entity1157 @entity648 @entity9744 @entity165
BACKGROUND/PURPOSE: We analyzed confluence patterns of @entity9744 , seeking to relate hepato-lithiasis to anatomic variation. The comparative study was completed @entity1 with hepatolithiasis in Taiwan and Japan. METHODS: Direct cholangiography was performed in 103 hepatolithiasis @entity1 in Taiwan and 77 in Japan. Segmental ducts patterns were classified as type I, normal configuration; type II, "triad" confluence; type III, @entity1157 ; or type IV, distal confluence of the right posterior segmental duct. RESULTS: Taiwanese @entity1 had only @entity648 or black stones, and were mostly female. As overall analysis, types I, II, III, and IV were found in 61, 26, 13, and 3 @entity1 , respectively. In Japanese, types I, II, III, and IV were found in 52, 10, 13, and 2, respectively. There was no difference between the two institutes. Since no @entity1 in Taiwan had @entity165 calculi, Japanese @entity1 were reanalyzed including only 58 @entity1 with @entity648 or black stones. Differences in those populations remained insignificant. CONCLUSION: Anatomic variations in segmental ducts apparently do not contribute to pathogenesis of hepatolithiasis.
