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Pyonephrosis

**Pyonephrosis**
*Classification & external resources*
ICD-10	N13.6
ICD-9	590.0, 590.1, 590.8
eMedicine	med/2851
MeSH	C12.777.419.570.643.790

Pyonephrosis (Greek pyon "pus" + nephros "kidney") is an infection of the renal collecting system. Pus collects in the renal pelvis and causes distension of the kidney. This requires drainage, best performed by nephrostomy.

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Pyonephrosis is sometimes a complication of renal stones, which can be a source of persisting infection. It may also occur spontaneously.

v • d • e Urinary system - Pathology - Nephrology (N00-N39, 580-599)
Diseases of the glomerulus	Glomerulonephritis - Focal segmental glomerulosclerosis - Membranoproliferative glomerulonephritis - Membranous glomerulonephritis - Nephritic syndrome - Post-streptococcal glomerulonephritis - Nephrotic syndrome (Minimal change disease) - IgA nephropathy - Lupus nephritis - Diabetic nephropathy - Rapidly progressive glomerulonephritis
Tubulointerstitial diseases of the kidney	Interstitial nephritis - Pyelonephritis - Hydronephrosis - Pyonephrosis - Balkan nephropathy - Reflux nephropathy
Renal failure	Acute renal failure (Acute tubular necrosis) - Chronic renal failure
Urolithiasis	Kidney stone - Renal colic
Diseases of the renal tubule and other disorders of kidney and ureter	Renal osteodystrophy - Nephrogenic diabetes insipidus - Renal tubular acidosis - Nephroptosis - Ureterocele
Other diseases and disorders of urinary system	urinary bladder: Cystitis (Interstitial cystitis, Trigonitis) - Neurogenic bladder - Vesicointestinal fistula urethra: Urethritis (Non-gonococcal urethritis) - Urethral syndrome - Urethral stricture Urinary tract infection
Tumors of the kidney	Renal cell carcinoma - Wilms' tumor (children)
See also congenital conditions (Q60-Q64, 753)