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Case Reports in Radiology
Volume 2018, Article ID 1698286, 5 pages
Case Report

Focal Xanthogranulomatous Pyelonephritis with Pulmonary Lesions on the Background of Type Two Diabetes Mellitus

1Isfahan University of Medical Science, Kashani Hospital, Kashani Ave, Isfahan, Iran
2University of Queensland, St. Lucia, QLD, Australia
3Department of Pathology, Isfahan Kidney Diseases Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran
4Department of Internal Medicine, Saadi Hospital, Isfahan, Iran
5Department of Radiology, Saadi Hospital, Isfahan, Iran

Correspondence should be addressed to Arash A. Boora; moc.liamg@aroob.hsara

Received 13 September 2017; Accepted 4 January 2018; Published 31 January 2018

Academic Editor: Vincent Low

Copyright © 2018 Ahmad Enshaei et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Focal Xanthogranulomatous pyelonephritis is a rare chronic inflammatory condition of kidneys which usually is associated with postrenal obstruction or renal stone leading to chronic bacterial infection and eventually chronic glomerular inflammation. About 90% of cases are of the diffuse type and associated with staghorn renal calculi. The case presented in this paper is of the focal type in a 58-year-old diabetic female. Interestingly she did not have symptoms or laboratory presentation of chronic renal bacterial infection except for elevated ESR. She sought medical attention due to severe pulmonary infection of the background of morbid obesity. Imaging studies revealed several pulmonary lesions and a large mass of the right kidney which was indistinguishable from renal malignancy. After surgical resection of the right kidney, the lesion is pathologically diagnosed to be a focal Xanthogranulomatous pyelonephritis. The pulmonary lesions were spontaneously resolved about three months following right nephrectomy.