title: Focal xanthogranulomatous pyelonephritis simulating a renal tumor: CT characteristics.
abstract: Xanthogranulomatous pyelonephritis is the replacement of renal parenchyma by large lipid-filled macrophages clinically associated with an enlarged, nonfunctioning kidney containing a calculus in the diffuse form or tissue destruction in one pole of a duplicated kidney associated with a calculus in the focal form. We report a case where a focal mass in a functioning kidney with no evidence of calculus, duplication, or fat density simulated a primary renal tumor.
authors.affiliation: Department of Radiology, University Hospitals of Cleveland, OH 44106.
authors.forename: M
authors.initials: M
authors.lastname: Shah
authors.forename: J R
authors.initials: JR
authors.lastname: Haaga
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D007669:Kidney Calculi; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D011705:Pyelonephritis, Xanthogranulomatous / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed