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Related Experiment Videos

Muconephrosis.

Sangtae Park1, Maxwell V Meng, Mathew S Greenberg

  • 1Department of Urology, University of California, San Francisco, School of Medicine, San Francisco, California 94143-0738, USA.

Urology
|July 26, 2002
PubMed
Summary
This summary is machine-generated.

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A rare case of a mucus-filled kidney (muconephrosis) revealed a urothelial villous adenoma. This finding highlights the importance of considering neoplastic causes for muconephrosis.

Area of Science:

  • Urology
  • Pathology
  • Surgical Oncology

Background:

  • Muconephrosis, a rare condition of mucus accumulation in the kidney, is often associated with obstruction or infection.
  • Xanthogranulomatous pyelonephritis is a chronic destructive bacterial infection of the kidney, typically presenting with obstruction.

Observation:

  • A patient undergoing laparoscopic nephrectomy for presumed xanthogranulomatous pyelonephritis developed muconephrosis.
  • Severe perinephric fibrosis necessitated conversion to open surgery and hemicolectomy due to suspected renal-enteral fistula.

Findings:

  • Pathologic examination identified a rare renal pelvic villous adenoma and diffuse intestinal metaplasia of the urothelium.
  • No evidence of enteral communication or gastrointestinal pathology was found.

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Implications:

  • Urothelial villous adenoma is an extremely rare diagnosis that requires consideration of neoplastic etiologies.
  • Management of muconephrosis should include evaluation for rare tumors like appendiceal mucinous cystadenocarcinoma and renal pelvis adenocarcinoma.