WHEN AND WHY IS PLACED KIDNEY THERE IS COLON OBSTRUCTION/ REGARDS FLOW URINE BY KIDNEY TO BLADDER/ MAIN OBSTACLE A STONE IN THE KIDNEY/ THE PRANSPORTATION OF STONE/ OBSTRUCTED URETER AND SPACE KIDNEY/CAUSING DILATION AND HYDRONEPHROSIS/ WELL PUT THEM URETERAL STENT/ THIS AVOIDS HYDRONEPHROSIS AND DAMAGE KIDNEY