Functional and Morphological Outcomes of Pyeloplasty at Different Ages in Prenatally Diagnosed Society of Fetal Urology Grades 3-4 Ureteropelvic Junction Obstruction: Is It Safe to Wait?

Early surgery leads to a significant improvement in DRF. Wait times greater than 1 month can decrease functional improvement. For patients with prenatally diagnosed SFU grades 3-4 UPJO, early pyeloplasty is recommended in those with increasing renal pelvic APD and an obstructed renogram with differential renal function <40%.