A NEW SYSTEM FOR DESCRIPTIVE CLASSIFICATION OF STONES IN THE UPPER URINARY-TRACT

A descriptive classification is proposed to stratify upper urinary tra ct stones by their number, size and location. The system considers the minimal but most important factors regarding the choice of surgical t reatment and its success. Its principle is adaptable to more complex s taging systems already existing. Practical use of the system has shown it to reflect clinical events, and its simplicity offers an opportuni ty for compliance in routine clinical study. It facilitates easy compu terized stratification of stones in the upper urinary tract.