A 3 years old 12kg female child with pyonephrosis with renal scan shows 9% of relative function. Left PCN done and its output was about 145 ML per day. On 25th PCN day renal scan showed 14% relative function.
Nephrostomogram show no puj obstruction. Mucus is normal.MCUG is normal, USG shows resolving HN with parynchmal thickness 12 to 15 mm. What is the diagnosis and treatment of this pyoneprosis?