[Renal size in children with normal renal 99mTc-DMSA scan: building a nomogram with scintigraphic length]. / Tamaño renal en niños con gammagrafía renal Tc99m-DMSA normal: construcción de un nomograma con longitudes cintigráficas.

AIM: The aim of this study was to evaluate renal size in children with normal 99mTc-DMSA scans and to compare it with the published ultrasonographic values. MATERIAL AND METHODS: Renal length of DMSA normal scans obtained from 253 children with history of urinary tract infection was measured. Regression analysis and length/age curves were done. Scintigraphic values were compared with published normal ultrasonographic length. RESULTS: Regression algorithm for the whole group of patients was length (cm) = 6.1727 age (yr)0,1535. In the first year of life the equation was length (cm) = 0.1524 age (month) + 4.568, and in 1-16 yr children it was length (cm) = 0.2644 age (yr) + 6.319. There were no significant differences between both genders or in regards to reference ultrasonographic data. CONCLUSION: Both renal 99mTc-DMSA scintigraphy and ultrasonography are useful tools for estimating renal size in children according age.