Abstract

TENTONI, Ubaldo et al. Xanthogranulomatous pyelonephritis: Six case reports. Rev. argent. radiol. [online]. 2011, vol.75, n.4, pp.291-295. ISSN 1852-9992.

Introduction. Xanthogranulomatous Pyelonephritis (XP) is a chronic infection of the renal parenchyma. Objectives. To analyze the imaging features of XP. Materials and Methods. We conducted a retrospective analysis of 6 confirmed cases of XP. Results. We described the imaging findings of the abovementioned cases. Discussion. Clinical manifestations suggest renal disease and imaging leads to probable diagnosis. The process often extends to the perirenal space. CT is very useful because sonographic and urographic findings may be nonspecific. In CT scans, XP is associated with the presence of a large calculus, enlargement of the kidney or of a segment , poor or no elimination of the contrast agent and the presence of focal masses of low attenuation (-10 to 15UH) whose walls are enhanced after the administration of intravenous contrast. Conclusions. Diagnosis is suspected when there is a combination of unilaterality, lithiasis, increased size of the kidney, no elimination of contrast medium, masses of low attenuation and perirenal space involvement.

Keywords : Chronic urinary infection; Perirenal space, abscesses and fistulas; Staghorn calculi; Xanthogranulomatous Pyelonephritis.

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