White pyramid sign (kidney)

The white pyramid sign, also known as dense renal medulla sign (DRM) or hyperdense renal pyramids sign, refers to the CT appearance of the medullary pyramids of the kidney which can be seen normally on unenhanced CT scans as high-attenuation triangular structures.

Etiology

Inspired signs
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Article information

rID: 28362
System: Urogenital
Section: Signs
Synonyms or Alternate Spellings:
  • Hyperdense renal pyramids sign
  • Dense renal medulla sign (DRM)
  • Renal white pyramid sign

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Cases and figures

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