of the 25 patients with radiolucent stones , the stones in 20 ( ( 80 % ) were predominantly cholesterol in type but radiology was misleading in five ; three contained 40-55 % calcium salts but were still radiolucent while two were amorphous and contained less than 10 % cholesterol by weight on chemical analysis . while radiology was sometimes misleading when the stones were small and irregular , large radiolucent stones with a smooth profile were invariably cholesterol-rich stones . the results also show that in men calcified stones were commoner than in women and that in older women the gallstones contained more calcium salts and less cholesterol than in younger women less than 50 yr ) .
C0006736
stones
C0008350
gallstones