 Retrograde pyelograms were suspicious on the right and cleared with ureteroscopy and the left renal pelvic washing was positive but this may represent contamination from the lower urinary tract as radiographically, there were no abnormalities. 
Retrograde pyelograms were suspicious on the right and cleared with ureteroscopy and the left renal pelvic washing was positive but this may represent contamination from the lower urinary tract as radiographically , there were no abnormalities .