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Systemic Light Chain Amyloidosis Mimicking Rheumatic Disorders.
Rohit R Rao1, Wai Chung Yong2, Mary Chester Wasko3
1Department of Hematology/Oncology, Allegheny Health Network, 320 East North Avenue, Pittsburgh, PA 15212, USA.
Primary amyloidosis can mimic rheumatologic diseases, delaying diagnosis. Prompt recognition of amyloidosis symptoms is crucial for early diagnosis and improved outcomes, as demonstrated in a case resolved by stem cell transplant.
Area of Science:
- Rheumatology
- Nephrology
- Hematology
Background:
- Secondary amyloidosis often complicates chronic inflammatory autoimmune diseases.
- Primary amyloidosis can present with symptoms overlapping rheumatologic disorders, leading to misdiagnosis.
- Early identification of amyloidosis is critical for effective treatment and prognosis.
Purpose of the Study:
- To highlight the clinical similarities between light chain amyloidosis and rheumatologic disorders.
- To emphasize the importance of prompt recognition and diagnosis of amyloidosis.
- To present a case of lambda light chain systemic amyloidosis initially misdiagnosed as Undifferentiated Connective Tissue Disease.
Main Methods:
- Case report of a 53-year-old woman.
- Clinical presentation including dystrophic nails, dry eyes, carpal tunnel syndrome, Raynaud's phenomenon, and antinuclear antibody.
- Abdominal fat pad biopsy for diagnosis.
- Treatment with autologous stem cell transplantation.
Main Results:
- The patient was initially misdiagnosed with Undifferentiated Connective Tissue Disease (UCTD).
- Lambda light chain systemic amyloidosis was confirmed via abdominal fat pad biopsy.
- Complete symptom resolution was achieved following autologous stem cell transplantation.
Conclusions:
- Clinical features of light chain amyloidosis can closely resemble primary rheumatologic conditions.
- Vigilance for amyloidosis symptoms is essential to avoid diagnostic delays.
- Early diagnosis and treatment, such as stem cell transplantation, can significantly improve outcomes for systemic amyloidosis.
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Amyloid Fibrils
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid Fibrils