Perinephric stranding

Perinephric stranding refers to the appearance of oedema within the fat of the perirenal space on CT or MRI. While a degree of symmetric bilateral perinephric stranding is common, particularly in the elderly, asymmetric or unilateral perinephric stranding is an important sign of renal inflammation or of acute obstruction. As such, it is seen in conditions such as acute pyelonephritis and with ureteric calculi.   

Share article

Article information

rID: 36555
System: Urogenital
Section: Signs
Tag: stub, refs, cases
Synonyms or Alternate Spellings:
  • Perinephric fat stranding

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Case 1a: pyelonephritis on left
    Drag here to reorder.
  • Drag
    Case 1b: pyelonephritis (zoomed in)
    Drag here to reorder.
  • Drag
    Case 1c: pyelonephritis (zoomed in)
    Drag here to reorder.
  • Drag
    Case 2: on left due to ureteric stone
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

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

    Alert accept Thank you for updating your details.