Infection and accumulation of pus within the kidney
Medical condition
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.
Pyonephrosis (from Greek pyon 'pus' and nephros 'kidney'[1]) is a dangerous kidney infection that is characterized by pus accumulation in the renal collecting system.[2] It is linked to renal collecting system blockage and suppurative renal parenchymal destruction, which result in complete or nearly complete kidney failure.[3]