Pyonephrosis

Pyonephrosis (Greek pyon "pus" + nephros "kidney") is an infection of the kidneys' collecting system. Pus collects in the renal pelvis and causes distension of the kidney. It can cause kidney failure.

Causes

Pyonephrosis is sometimes a complication of kidney stones, which can be a source of persisting infection. It may also occur spontaneously. It can occur as a complication of hydronephrosis or pyelonephritis.

Treatment

This requires drainage, best performed by ureteral stent placement or nephrostomy.

See also

• Pyelonephritis
• Nephrotic syndrome