Can Ultrasound Predict Which Kidney Will Deteriorate?

Ultrasound is the first study in most children with hydronephrosis. But can it predict obstruction?This episode examines the limits and power of ultrasound in pediatric ureteropelvic junction obstruction. We discuss AP diameter, calyceal dilation, cortical thinning, renal growth, serial imaging, and why one ultrasound is rarely enough.The central idea: ultrasound does not diagnose obstruction alone, but serial ultrasound can reveal the kidney that is declaring risk over time.Keywords: UPJO, hydronephrosis, pediatric ultrasound, pyeloplasty, renal deterioration.