Summary

Hydronephrosis is a frequent pediatric pathology which requires careful follow-up. Among the available complementary methods to rule out an obstruction of the urinary tract is ^99mTc- MAG3 (mercaptoacetyltriglycine) diuretic renography which, due to its tubular secretion and high renal extraction, represents the radiopharmaceutical of choice for this age group. This method makes it possible to define whether the eventual urinary tract obstruction is high (ureteropelvic junction) or low (ureterovesical junction); some studies have shown that the F0 protocol has advantages over other protocols (F-15, F+20). We have used the F+10 protocol with good results and we have compared them with the corresponding surgical findings.

Key words: ^99mTc-MAG3, diuretic renography, pediatrics, hydronephrosis, furosemide.