Related Experiment Video
Updated: Mar 28, 2026

Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis
Published on: July 18, 2017
Xantogranulomatous pyelonephritis: The missed diagnosis
Yassine El Abiad1, Youness Dehayni1, Abdelmounaim Qarro1
1Department of Urology, Military Hospital Moulay Ismail, Meknès, Morocco.
Introduction:
Xantogranulomatous pyelonephritis (XGPN) is a rare chronic inflammatory disease of the kidney that can be focal or diffuse with the focal form imitating greatly renal cell carcinoma (RCC).
Presentation Of Case:
We report a challenging clinical case of a 38-year old male with right flank pain persisting for 3-months, imaging showed an 8cm heterogenous mass of the upper pole of the right kidney and invading the liver. A right radical nephrectomy including the adrenal in the resection was performed under the tentative diagnosis of renal cell carcinoma (RCC) whereas histology revealed focal XGPN.
Discussion:
Preoperative diagnosis of focal XGPN was difficult because of radiological similarities to RCC and lack of history of stone disease or urinary tract infection.
Conclusion:
This case highlights the need to include XGPN in the differential diagnosis of RCC even in the era of modern imaging.
More Related Videos
09:43Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
Published on: June 8, 2022
07:15In vivo Macrophage Imaging Using MR Targeted Contrast Agent for Longitudinal Evaluation of Septic Arthritis
Published on: October 20, 2013
Related Concept Videos
Acute Pyelonephritis I: Introduction
Acute Pyelonephritis II: Diagnostic Studies and Management
Atypical Pneumonia
Imaging Studies V: Intravenous Urography and Retrograde Pyelography
Urinary Tract Infection II: Pathophysiology
Pulmonary Tuberculosis III
The first classification is based on the development of the disease, and it includes the following categories: