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Value of Supranormal Function and Renogram Patterns on ^99mTc-Mercaptoacetyltriglycine Scintigraphy in Relation to the Extent of Hydronephrosis for Predicting Ureteropelvic Junction Obstruction in the Newborn

¹ Department of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
² Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
³ Department of Urology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
⁴ Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
⁵ Department of Information and Statistics, Daejeon University, Daejeon, Korea

View larger version (47K): [in a new window]   FIGURE 1. Posterior 2-min-interval images of 99mTc-MAG3 scan are displayed. (A) Basal renal scan (38 d after birth) of boy with SFU grade 4 hydronephrosis of left kidney demonstrates evidence of delayed parenchymal transit (persistent renal parenchymal activity and delayed appearance of pelvocalyceal radiotracer). Differential renal function of left kidney was 43%. (B) Diuretic scan shows deterioration of clearance from left renal pelvis (t1/2 > 20 min). Postoperatively, improved hydronephrosis and drainage (t1/2 = 8 min) were observed on ultrasonography and diuretic 99mTc-MAG3 scan at 6 mo.