Renal Calculi / Renal Lithiasis
Uric Acid Calculi
increased food intake with high purine content, yellowish and moderately hard
Adenine calculi
inherited enzyme deficiency and hyperuricemia
Triamterene calculi
insoluble diuretic; mustard colored stones
Calcium Oxalate Calculi
major constituent of renal calculi, very hard and dark and rough
Phosphate Calculi
pale and friable
microscopic hematuria
primary urinalysis finding in renal lithiasis
Cystine Calculi
yellow-brown, greasy, resembles an old soap and the least common calculi
Xanthine Calculi
absence of xanthine oxidase
Triple Phosphate Calculi
accompanied by urinary infections involving urea-splitting bacteria