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Abscess (perinephric)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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This may occur as a complication of pyelonephritis, particularly if there is a large 'staghorn' calculus present, when the pus discharges through the renal capsule into the perinephric fat. Also may develop as a result of haematogenous infection of a traumatic perinephric haematoma.


  • systemic symptoms of infection
  • local low-grade symptoms
  • pyuria


  • ultrasound or radiology may reveal a non-functioning renal mass which contains a fluid level


  • drainage of the abscess
  • nephrectomy may be required

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