My 7-month-old son has been diagnosed with hydronephrosis in his left kidney and PUJ obstruction. The doctor has recommended surgery, but we're unsure whether it's really necessary right now. How can we check if the condition is progressive or not? Should we go ahead with the surgery or wait to see if it improves on its own?

To monitor the progression of your son's hydronephrosis with PUJ obstruction, your doctor may recommend regular ultrasound scans (every 3-6 months) to assess kidney function, drainage, and signs of deterioration; additionally, nuclear medicine studies like MAG3 or DMSA scans may be performed to evaluate kidney function and obstruction; surgery is often recommended for PUJ obstruction to prevent long-term kidney damage, but the timing depends on the severity of the obstruction, kidney function, and your child's overall health