Pyelonephritis other imaging findings

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Other Imaging Findings

Contrast Nephrograms

Acute Pyelonephritis

  • Acute pyelonephritis consist of focal areas of striated or wedge-shaped hypoperfusion, resulting in a characteristic striated nephrogram.
  • Striations result from stasis of contrast material within edematous tubules that demonstrates increasing attenuation over time.
  • The infected kidney is usually enlarged, and there is often stranding in the perinephric fat.
  • Delayed views of the infected kidney may demonstrate a nephrogram with increased attenuation.

Urography

Xanthogranulomatous Pyelonephritis

  • Classic urographic triad in diffuse xanthogranulomatous pyelonephritis consists of unilaterally decreased or (more commonly) absent renal excretion, a staghorn calculus, and a poorly defined mass or diffuse renal enlargement.

References

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