The authors analyzed 34 patients admitted to Ewha Womans University Hospital from January, 1, 1979 to June, 30, 1979 by animpression of cholelithiasis clinically. Ultrasonic and radiologic cholecystography were performed in all patients. In 20 patients of 34 patients, exploration was done. The result were as follow:
1) The accuracy of gallstone detected by *ultrasound was 90%, which confirmed by exploratory laparotomy (20 cases), but 88% in non-visualized gallbladder by oral cholecystography(20 cases). False positiv was 65yo (1 case) and false negative was 6% (1 case). i
2) In 13 cases (38%) GB stone was visualized by oral cholecystography, while in 20 cases (59% were nonvisualized GB. Well opacified gall bladder without stone was in 1 case (3%)
3) In 20 cases that gall bladder wasn´t visualized by oral cholecystography, gall stone was detected in 17 cases (85%, normal GB in 2 cases (10%), no stone in 1 _ case (5%) by ultrasonography.
4) Among 20 cases which were confirmed by operation, 4 cases were concomitant with cholecystography, ultrasonography and operative findings. Among 16 cases nonvisualized by oral cholecystography, 15 cases were detected as gall stone by ultrasonography, which were gall stone in 14 cases, normal gall bladder in 1 case (i. e. false positive, 016) and no stone in 1 case (i.e. false negative, 6%).
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