Prevalence and incidence of urinary lithiasis are increasing in western cou
ntries. Oxalocalcic stone is the major form of urinary calculi but other fo
rms are not unusual. Characteristics of the collected stone may improve the
diagnosis investigations. Rationnal blood and urine examinations are essen
tial for this medical managment. Most of the various metabolic abnormalitie
s in cause can be corrected from specific dietary measures.