The rim nephrogram in renovascular compromise

Terrence C. Demos*, Kathleen Gadwood, Leon Love, Geoffery Engel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The nephrogram is a sensitive indicator of renovascular compromise. An infrequently reported but characteristic nephrographic abnormality is the cortical rim nephrogram. This "rim sign" refers to a thin nephrographic rim outlining a kidney with an otherwise faint nephrogram. We report 2 patients with this nephrographic appearance due to acute renal artery insult. The rim nephrogram is a reliable sign of underperfusion of the kidney. It is dependent on collateral capsular vessels supplying the outer renal cortex. Underperfusion can be due to a primary renal artery problem or secondary to compromise of renal artery perfusion because of elevated interstitial or tubular pressure in the kidney. The sign has not been described with systemic circulatory problems.

Original languageEnglish (US)
Pages (from-to)227-230
Number of pages4
JournalUrologic Radiology
Issue number1
StatePublished - Dec 1 1982


  • Cortical rim
  • Nephrogram
  • Renal artery
  • Renal underperfusion

ASJC Scopus subject areas

  • Urology
  • Radiology Nuclear Medicine and imaging


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