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Isolated renal giant cell arteritis.
George Medvedev1, Ali E R Al-Shamari, Michael A Copland
1Department of Pathology and Laboratory Medicine, and Division of Nephrology, University of British Columbia, Vancouver, British Columbia, Canada.
Summary
Giant cell arteritis (GCA) can affect the kidneys, causing rare renal failure. Prompt diagnosis and corticosteroid treatment, like prednisone, can significantly improve kidney function in affected patients.
Area of Science:
- Nephrology
- Rheumatology
- Pathology
Background:
- Giant cell arteritis (GCA) typically affects the temporal arteries but can involve intrarenal vessels.
- Renal involvement in GCA can manifest as diverse lesions, including necrotizing arteritis and glomerulonephritis.
- Isolated GCA of the kidney is an uncommon etiology of renal failure.
Observation:
- A previously healthy 54-year-old woman presented with nonoliguric renal failure, low-grade fever, and myalgias.
- Initial serological tests for autoimmune markers (ANA, ANCA) were negative.
- Renal biopsy showed granulomatous infiltration of arterial and arteriolar walls with interstitial infiltrates, but no significant glomerular pathology.
Findings:
- The renal biopsy findings were consistent with granulomatous arteritis affecting the kidney.
- The patient's presentation mimicked other causes of renal failure, highlighting the importance of biopsy.
- Absence of typical GCA symptoms like headache or visual disturbances complicated the initial diagnosis.
Implications:
- This case underscores that GCA can present with isolated renal involvement and renal failure.
- Early recognition and treatment of renal GCA with corticosteroids can lead to substantial recovery of kidney function.
- Further research into the specific mechanisms and diagnostic markers for renal-limited GCA is warranted.