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[Pseudo-tuberculous pyelonephritis]

S Valerdiz Casasola1, L Parra Muntaner, J García Alonso

  • 1Servicio de Anatomía Patológica, Hospital Camino de Santiago, Ponferrada, Leon, España.

Archivos Espanoles De Urologia
|March 1, 1994
PubMed
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This study details a rare case of caseating granulomatous pyelonephritis in a 67-year-old woman, mimicking renal tuberculosis without detected microorganisms. This highlights a unique presentation of kidney inflammation and stones.

Area of Science:

  • Nephrology
  • Pathology
  • Infectious Diseases

Background:

  • Pyelonephritis is a common kidney infection, often bacterial.
  • Nephrolithiasis (kidney stones) can complicate or predispose to pyelonephritis.
  • Granulomatous inflammation in the kidney can be associated with infections like tuberculosis.

Observation:

  • A 67-year-old woman presented with symptoms suggestive of kidney inflammation and stones.
  • Renal biopsy revealed caseating granulomas within the renal parenchyma.
  • The granulomatous changes closely resembled those seen in renal tuberculosis.

Findings:

  • Despite the histological appearance, extensive microbiological investigations were negative for Mycobacterium tuberculosis and other common pathogens.
  • No microorganisms were identified in renal tissue or urine cultures.

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  • This represents the second reported case of non-tuberculous caseating granulomatous pyelonephritis associated with nephrolithiasis.

    • Implications:

    • This case expands the differential diagnosis for granulomatous kidney disease.
    • It underscores the importance of considering non-infectious or atypical infectious causes even with tuberculosis-like histology.
    • Further research may be needed to elucidate the etiology and optimal management of such rare conditions.