Rim sign in chronic hydronephrosis

The rim sign can be seen in association with chronic hydronephrosis

In patient's with chronic hydronephrosis, in all forms of contrast-enhanced imaging of the obstructed kidney, enhancement may occur in the residual, but markedly atrophic, renal parenchyma, surrounding the dilated calices and renal pelvis.1-2

The inner margin of this hydronephrotic rim is concave toward the renal hilum, and enhancement of the cortical columns between the dilated collecting system elements may be seen. The unopacified urine within the dilated system may act as a negative pyelogram.

See also

Other rim signs in radiology

Share article

Article Information

rID: 21758
System: Urogenital
Section: Signs
Tag: cases
Synonyms or Alternate Spellings:
  • Rim sign of chronic hydronephrosis
  • Hydronephrotic rim sign
  • The rim sign of hydronephrosis

Support Radiopaedia and see fewer ads

Cases and Figures

  • Drag
    Case 1: Left kidney severe hydronephrosis
    Drag here to reorder.
  • Drag
    Case 2: IVU, right kidney
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

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

    Alert accept Thank you for updating your details.