Multimodality imaging of renal inflammatory lesions

Table 1 Spectrum of renal infections

Acute	Chronic	Others
Acute pyelonephritis	Chronic pyelonephritis	Tuberculosis
Focal nephritis	Xanthogranulomatous pyelonephritis	Fungal
Abscess	Malakoplakia
Emphsematous pyelonephritis	Eosinophilic cystitis
Papillary necrosis
Pyonephrosis

Table 2 Emphysematous pyelonephritis

	TYPE 1 -33%	TYPE 2 -66%
Parenchymal destruction	Severe – streaky gas radiating from medulla to cortex with crescent of subcapsular gas	Less
Fluid collection	None as the reduced immune response limits pus collection	Renal or perirenal fluid collection is characteristic
Mortality	80%	20%
Treatment	Nephrectomy	Aggressive medical treatment with percutaneous drainage