A 21-year-old female asked about a male:

What does it mean if a child has mild dilation of the left renal pelvis with no associated hydronephrosis on an ultrasound? what might cause this, and is it something to be concerned about?

1 doctor answer1 doctor weighed in
Dr. Hiep Le
Dr. Hiep Leanswered
Nephrology and Dialysis 44 years experience
Your child probably has a congenital urinary defect which is called ureteropelvic junction, UPJ, obstruction which can be detected by US before birth & it usually gets better when the child gets older. In his case, the abnormality is mild and there is no hydronephrosis so the left kidney function should be intact. I wonder why kidney US was done at 6 years old & if routine fetal US had been done.
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Last updated May 23, 2023


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