Posterior urethral dilatation; urinary bladder changes 1
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Posterior urethral dilatation present; no bladder changes
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Moderate to severe changes
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Severe changes; persistent after therapy
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Hydronephrosis/hydroureteronephrosis
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Mild (no calyceal dilatation)
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Moderate (with calyceal dilatation)
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Severe (with cortical thinning)
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Vesicoureteric reflux
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Nil/mild (grade 1/2)
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Grade 3
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Grade 4/5
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Features of valve bladder syndrome
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Absent
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Absent
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Present
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Renal function tests
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Normal
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Abnormal; normalizing with therapy
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Persistently abnormal
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Renal parenchymal involvement2
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Absent
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Unilateral, Mild (< 15%) functional deterioration
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Bilateral/moderate to severe (> 15%) functional deterioration
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Systemic complications3
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Absent
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Absent
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Present
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