Emphysematous Pyelonephritis


KEY FACTS

Imaging

  • Best imaging tool: CT

  • CT findings

    • Intraparenchymal gas ± perirenal extension

    • ± renal or perirenal fluid collections

    • Classification systems based on distribution of gas and fluid collections

  • Ultrasound findings

    • Nondependent echogenic foci in renal parenchyma &/or collecting system

    • "Dirty shadowing"; ring-down artifacts

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