There are different degrees of severity of urinary reflux, graded from 1 to 5. Grade 1 is the mildest form, while grade 5 is the most severe.
Urine refluxes part-way up the ureter.
Urine refluxes all the way up the ureter.
Urine refluxes all the way up the ureter with some widening of the ureter and the part of the kidney where urine collects (calyces).
Urine refluxes all the way up the ureter with a marked widening of the ureter and the part of the kidney where urine collects.
Reflux of large amounts of urine up the ureter. Marked twisting and widening of the ureter and the part of the kidney where urine collects.
Illustrations of normal kidneys, ureter and bladder and grades 1 to 5 reflux by Dr Greta File. Property of KidsHealth.
This page last reviewed 28 October 2021.
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