SPONTANEOUS URINARY EXTRAVASATION ASSOCIATED WITH RENAL COLIC CAUSING A PERINEPHRIC ABSCESS

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Abstract
Pyelosinous extravasation commonly results from acute ureteral obstruction. Ordinarily, operative drainage is not called for, but in I case a perinephric abscess resulted and required drainage. The extravasation probably is responsible for most instances of perinephritis and perinephric abscesses rather than direct ruptures of cortical abscesses. It also accounts for some cases of fibrolipomatosis of the renal sinus, localized retroperitoneal fibrosis and, occasionally, strictures of the upper ureter and calyceal infundibula. In episodes of ureteral obstruction, the associated fever and leukocytosis are often due to extravasation when urinary tract infection is absent.

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