n. obstruction and infection of the kidney resulting in pus formation. A kidney stone is the usual cause of the obstruction, and the kidney becomes distended by pus and destroyed by the inflammation, which extends into the kidney substance itself and sometimes into the surrounding tissues (see perinephritis). Treatment is urgent *nephrectomy under antibiotic cover.
A branched renal stone formed in the image of the collecting system of the kidney (see KIDNEYS). It ?lls the calyces and pelvis and is commonly associated with an infection of the urine, particularly Proteus vulgaris. The calculus may lead to pyonephrosis and an ABSCESS of the kidney.... staghorn calculus
a collection of pus around the kidney, usually secondary to *pyonephrosis but also resulting from spread of infection from other sites. It is more likely to occur in individuals who are immunosuppressed or have diabetes mellitus. Percutaneous or open surgical drainage are usually necessary but occasionally nephrectomy may be needed if the kidney is severely infected.... perinephric abscess
n. inflammation of the tissues around the kidney. This is usually due to spread of infection from the kidney itself (see pyelonephritis; pyonephrosis). The patient has pain in the loins, fever, and fits of shivering. Prompt treatment of the underlying renal infection is required to prevent progression to an abscess.... perinephritis
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