Pyonephrosis

Pyonephrosis
Watercolour drawing of a dissected kidney, showing a condition of acute pyonephrosis. The ureter is blocked by a calculus and several calculi are seen lying in the sacculi.
SpecialtyUrology 

Pyonephrosis (from Greek pyon 'pus' and nephros 'kidney') is a dangerous kidney infection that is characterized by pus accumulation in the renal collecting system. It is linked to renal collecting system blockage and suppurative renal parenchymal destruction, which result in complete or nearly complete kidney failure.

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