Teaching Points
- Ultrasound is the modality of choice and is used to exclude obstructive uropathy and to assess renal size and contour.
- In the absence of obstruction and evidence of pre-renal failure, the size and contour of the kidneys can be useful to assess the underlying cause of the renal failure.
- Further imaging in non-obstructive uropathy depends on the provisional diagnosis. For example Doppler US may be used to assess for renal artery stenosis.
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