title: Computed tomography in xanthogranulomatous pyelonephritis.
abstract: Two cases of xanthogranulomatous pyelonephritis (XGP) examined preoperatively by computed tomography are reported. In one, preoperative diagnosis of an inflammatory abscess-forming disease was possible. Several features of computed tomography in XGP permit differentiation from renal carcinoma. Global renal enlargement, the presence of calculi, the spread of infiltration into the fatty capsule with thickening of Gerota's fascia, and the characteristic density differences between cortex and medulla as a result of reduced contrast medium concentrations in the pyramids are suspicious of this special form of interstitial nephritis.
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006099:Granuloma / Q000000981:diagnostic imaging*; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging; D008875:Middle Aged; D011704:Pyelonephritis / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed; D014973:Xanthomatosis / Q000000981:diagnostic imaging*