The authers analyzed ultrasonographicaliy the total 22 cases of clonorchiasis verified by stool examination and skin test and operation at Busan National Uni'/ersity Hospital and St. Benedict Hospital for about 21 months from January 198 1 to September 1982.1. Clinical materials were consisted of 18 males an d 4 fe males who showed right upper quadrant pain in 20 cases (90.9%), being most common , and elevated phosphatase in 13 cases (59.1%) , eosinophilia in 10 cases (45.5%) , elevated SGOT in 10 cases (4 5.5%), elevated total bilirubin in 9 cases (4 1.0%), complication of hepatoma in 2 cases (9.1 %), and liver cirrhosis in 4 cases (18 .2%).2. On ultrasonogram , the gall bladder showed tense spherical shape of wall in 17 cases (77 .3%), mo re than 10cm in the longest diameter in 4 cases (1 8.2%), more than 3mm in the wall thickness in 9 cases (4 1.0%), and low level echogenicity with liquid-liquid level in the dependant part in 16 cases (72.7%).3. The main bile duct showed more than 4mm in diameter considered as normal or mod erate dilatation in 17 cases (77.3 %), 1-2mm in th e wall thickness , being most common , in 10 cases (45.5%), more than 2m m in 6 cases (2 7.3%), a nd intraluminallow level echogenicity in 14 cases (63.6%).4. The peripheral biliary duct showed short two paraliel echogenic lines indicating irregular dilatation of peripheral biliary duct in 20 cases (90.9%), echogenicity in dilated duct in 13 cases (59.1 %), and thickened wa ll a nd the stro ng ec hogen icity of wall in 16 cases (7 2 .7%).5. The gall stone was associated in 2 cases (9.1%), a nd the stone of biliary duct in 2 cases (9 .1%).

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