Usually results from rupture of an acute cortical abscess in the perinephric space or from haematogenous seeding from other sites of infection
Aetiology
- Pyrexial
- ~33% not pyrexial - usually chronic abscess
- Flank mass in 50%
Investigations
- Bloods - high WCC, high serum creatinine
- Urine - pyuria
- CT
Management
- Antibiotics and percutaneous or surgical drainage