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  • Title: Imaging of Renal Infections and Inflammatory Disease.
    Author: Zulfiqar M, Ubilla CV, Nicola R, Menias CO.
    Journal: Radiol Clin North Am; 2020 Sep; 58(5):909-923. PubMed ID: 32792123.
    Abstract:
    Acute pyelonephritis is a bacterial infection of the renal parenchyma and collecting system. Diagnosis is based on clinical findings of fever, flank pain, and urinary tract infection. Computed tomography findings include renal enlargement with wedge-shaped heterogeneous areas of decreased enhancement, known as a "striated nephrogram." Imaging is primarily used to diagnose complications such as emphysematous pyelonephritis, renal abscess, and pyonephrosis. Chronic pyelonephritis can have varying appearances on imaging ranging from xanthogranulomatous pyelonephritis or, in extreme cases, renal replacement lipomatosis.
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