Hello
Welcome to healthcareMagic
Your wife is sufferring from
kidney stone which is obstructing the urine
flow from kidney to the urinary bladder(VUJunction) therefore causing backpressure on the PCS which is a part of the kidney.this condition is called
Hydronephrosis secondary to urinary
calculus.
Treatment is removal of stone by appropriate method.
Kindly consult a nephrologist