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Amyloidosis and systemic lupus erythematosus
Human Pathology
|September 1, 1981
Summary
Systemic lupus erythematosus can cause kidney damage, including crescentic glomerulonephritis and secondary amyloidosis. This rare complication may lead to steroid-unresponsive kidney problems.
Area of Science:
- Nephrology
- Rheumatology
- Pathology
Background:
- Systemic lupus erythematosus (SLE) is a chronic autoimmune disease.
- Kidney involvement is common in SLE, often presenting as lupus nephritis.
- Amyloidosis, a protein misfolding disorder, is rarely associated with SLE.
Observation:
- A 59-year-old male patient with known SLE presented with new-onset proteinuria and declining renal function.
- Renal biopsy was performed to investigate the cause of kidney dysfunction.
- Histological examination revealed concurrent crescentic glomerulonephritis and amyloid deposition.
Findings:
- The amyloid deposits were located within the glomeruli and renal blood vessels.
- Amyloid was identified as secondary amyloidosis based on its characteristic degradation with potassium permanganate.
- Crescentic glomerulonephritis, a severe form of kidney inflammation, was also present.
Implications:
- This case highlights the uncommon but significant association between SLE and secondary amyloidosis.
- Secondary amyloidosis may contribute to steroid-unresponsive kidney disease in SLE patients.
- Recognizing this dual pathology is crucial for accurate diagnosis and management of lupus nephritis.