[Imaging of acute pyelonephritis : diagnostic benefits and prescribing habits].

Acute pyelonephritis is a potentially serious kidney infection that mainly affects women, children and the elderly. It may or may not be symptomatic (fever, pain, urinary disorders), and is most often caused by Escherichia Coli. Its incidence and cost are increasing, particularly in connection with the overuse of imaging. In 2018, clinical criteria were introduced to help identify cases requiring urgent imaging. A retrospective study was carried out at Liège University Hospital to analyse the reliability of these criteria for diagnosing complicated pyelonephritis (abscess or upper urinary tract obstruction). At the same time, prescribing practices were assessed.