Emphysematous pyelonephritis:
–fulminant gas forming infection of parenchyma, a necrotizingpyelonephritis with 70% mortality
–Probably due to a urinary tract infection occurring in a glucose richsubstrate in a patient with vascular impairment and/or immunecompromise
–Rapid destruction or renal parenchyma, residual fibrous septioutlined by gas
Emphysematous pyelitis: gas in collecting system, betterprognosis, associated with diabetes, obstruction
–Bubbles and loculated collections of gas, gas withing wall
–Tissue injury occurs in patients with more intact immune system,exudate accumulates and limits spread of infection resulting in anabscess which protects against further spread
Organisms: E. coli, Klebsiella, Aerobacter, Proteus