Related Experiment Video
Updated: Aug 19, 2026

Use of Ultra-high Field MRI in Small Rodent Models of Polycystic Kidney Disease for In Vivo Phenotyping and Drug Monitoring
Published on: June 23, 2015
A case of renal pseudotumor associated with chronic pachymeningitis
T Tanaka1, A Hamaguchi, R Kushima
1Department of Urology, Shiga University of Medical Science, Otsu, Japan. tsutomu@belle.shiga-med.ac.jp
Background:
A 56-year-old woman was referred to our hospital with a left renal mass.
Methods/Results:
Radiologic studies demonstrated a solitary space-occupying lesion in the left kidney and a malignant tumor was suspected. Left radical nephrectomy was then performed. Pathological examination revealed a sclerotic fibrous lesion with a rather distinct margin and no evidence of malignancy. These pathological findings were consistent with the diagnosis of a renal pseudotumor.
Conclusions:
This patient had a history of chronic pachymeningitis that formed a thoracic epidural focus causing spinal cord compression and the histologic appearance of this focus was similar to the renal lesion. It was concluded that this was a rare case of a renal pseudotumor associated with multifocal fibrosclerosis.
Related Concept Videos
Acute Pyelonephritis I: Introduction
Acute Pyelonephritis II: Diagnostic Studies and Management
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations
Acute Kidney Injury II: Pathophysiology
Bacterial Meningitis I: Introduction
Brain Abscess l: Introduction

