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AA amyloidosis in systemic lupus erythematosus
T Pettersson1, T Törnroth, K J Tötterman
1Fourth Department of Medicine, Helsinki University Central Hospital, Finland.
The Journal of Rheumatology
|August 1, 1987
Summary
Systemic lupus erythematosus can lead to secondary amyloidosis (AA), characterized by organ damage. This case highlights AA amyloidosis affecting the heart, spleen, and kidneys, confirmed by biopsy and autopsy.
Area of Science:
- Cardiology
- Nephrology
- Rheumatology
- Pathology
Background:
- Systemic lupus erythematosus (SLE) is a chronic autoimmune disease.
- Amyloidosis is a group of disorders characterized by the deposition of insoluble proteins in various organs.
- Secondary (AA) amyloidosis is associated with chronic inflammatory conditions.
Observation:
- A 37-year-old woman with a history of SLE presented with cardiac insufficiency, nephrotic syndrome, and azotemia.
- Diagnostic imaging (echocardiography, cardiac scintigraphy) suggested cardiac involvement.
- Biopsies of the rectum and subcutaneous abdominal fat confirmed amyloid deposition.
Findings:
- Postmortem examination revealed extensive systemic amyloidosis, particularly in the heart, spleen, and kidneys.
- Elevated serum amyloid A (SAA) protein levels were noted for four years.
- Immunohistochemical analysis confirmed the amyloid deposits were of the AA type.
Implications:
- This case underscores the potential for severe systemic amyloidosis in patients with long-standing SLE.
- Early recognition and management of inflammation in SLE may be crucial in preventing AA amyloidosis.
- Understanding the link between SLE, chronic inflammation, and AA amyloidosis is vital for patient outcomes.