Gudmrng sir..My son 4yr old.. last month he suffered from high fever so blood test was done with high CRP Levels with 100 it was repeated two times he admitted in hospital also.. done urine test also sir in that pus cell 30--40 he had doctor suggested ultrasound in that report bilateral hydroureteronephrosis nd Cystitis (Rt>Lt). suggested for MCUG rule out VUR..Is it dangerous sir.. here I attached the report sir..