Hi, Thanks for writing in. It is important to know the symptoms you had which made you consult your doctor. There are occasions when a kidney infection might cause hydronephrosis and hydroureter and this causes symptoms of fever and pain due to infection. Usually urine culture reports are indicative of an infection in these patients. Stones might also cause hydroureter and hydronephrosis after they have passed out and this is also one of the arguements put forth bu your doctor. This is to be suspected if you had severe pain along the sides of your abdomen going to the groin on the right side. Lastly it might be a congenital variation showing the swollen appearance of the kidney and proximal ureter. In this condition the other tests are normal and the patient usually does not have severe symptoms. Patient might be asymptomatic or have mild symptoms. This does not require any specific treatment. Please drink adequate amount of water. Please do not worry.