Acute pyelonephritis

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[edit] Discussion

  • Acute pyelonephritis is a common clinical diagnosis in patients who present with fever, chills, and flank tenderness.
  • Infections typically result from ascending retrograde spread through the collecting ducts into the renal parenchyma.
  • Patients are referred for CT evaluation of acute pyelonephritis when symptoms are poorly localized or complications are suspected.

[edit] Imaging Findings

[edit] CT

  • 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.

[edit] Images

Patient #1: CT images of a patient with acute pyelonephritis

[edit] See Also

[edit] External Links

[edit] References