Ultrasound images of Non-obstructive hydronephrosis
Not all renal dilatation is the result of an obstructive process and the kidney may frequently be
dilated for other reasons. Reflux This is the most common cause of non-obstructive
renal dilatation, and is normally diagnosed in children. Reflux is associated with recurrent urinary tract infections and can result in reflux nephropathy,
in which the renal parenchyma is irretrievably damaged.
Reflux can be distinguished from other causes of renal dilatation by observing the dilatation of the ureters at the bladder base, due to the retrograde
passage of urine. For a more detailed consideration of the diagnosis of reflux.
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