99mtechnetium dimercaptosuccinic acid (DMSA) uptake in normal renal units with no scarring. A slightly decreasing trend existed in the right and left kidneys with regard to mean percentage DMSA uptake in normal renal units without vesicoureteral reflux (VUR) and those with varying degrees of VUR (P=0.01 and P<0.001, respectively). The mean percentage uptakes for the left kidneys were 52%, 50%, 51%, 50%, and 49% and for the right kidney 51%, 50%, 50%, 50%, and 48% for grade 0, 1, 2, 3, and 4 VUR, respectively.