title: Focal xanthogranulomatous pyelonephritis -- a diagnostic dilemma.
abstract: Focal Xanthogranulomatous Pyelonephritis (XGPN) may be erroneously interpreted as renal cell carcinoma. We report a case of a young Philippino who presented with persisting right flank pain for 2 years. Imaging showed a well-delineated lesion in the lower pole of the right kidney extending to the hilum. Nephrectomy was performed under a tentative diagnosis of renal cell carcinoma, whereas histology revealed focal XGPN. Pre-operative diagnosis of focal XGPN was difficult because of radiological similarities to renal cell carcinoma and lack of the usual clinical presentation.
authors.affiliation: Department of Urology, Prince Abdullah bin Abdul Aziz Hospital, Bisha, P.O. Box 60, Kingdom of Saudi Arabia. sarwardr@hotmail.com
authors.forename: Muhammad Sarwar
authors.initials: MS
authors.lastname: Hussain
authors.forename: Vinay Kumar
authors.initials: VK
authors.lastname: Bhagat
mesh_terms: D000328:Adult; D002292:Carcinoma, Renal Cell / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis; D009392:Nephrectomy; D011705:Pyelonephritis, Xanthogranulomatous / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed