Last revised by Mostafa El-Feky on 29 May 2021

Hydroureter refers to abnormal dilation (>3 mm) of the ureter and may occur in combination with hydronephrosis

The term, megaureter, is usually reserved for ureters >7 mm in diameter. The term hydroureteronephrosis (or hydronephroureterosis) may be used when ureteric dilatation occurs in the presence of hydronephrosis

Clinical presentation is variable but may include:

  • flank pain
  • nausea, vomiting

Hydroureter is a non-specific finding. Etiologies include:

A ureteral diameter of >3 mm has been described as the cut-off for hydroureter 1,3.

From the Latin "hydro", meaning of water. 

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Case 1: ectopic ureter with massive hydroureter
    Drag here to reorder.
  • Case 2: recently passed left ureteric stone
    Drag here to reorder.
  • Case 3: TCC of the bladder with hydroureter
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.