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Lambda light chain deposition disease presenting as an amyloid-like arthropathy
C Rivest1, P P Turgeon, J L Senécal
1Division of Rheumatology, Hôpital Notre-Dame, University of Montreal School of Medicine, PQ, Canada.
The Journal of Rheumatology
|May 1, 1993
Summary
Lambda light chain deposition disease (LCDD) can cause arthritis, skin nodules, and soft tissue hardening. This case highlights unique musculoskeletal symptoms, distinguishing it from amyloid arthropathy.
Area of Science:
- Nephrology
- Rheumatology
- Pathology
Background:
- Lambda light chain deposition disease (LCDD) is a rare plasma cell disorder characterized by the deposition of monoclonal lambda light chains in organs.
- Musculoskeletal manifestations are not typically associated with LCDD, making its presentation in joints and soft tissues unusual.
Observation:
- A patient presented with symmetric, seronegative, nonerosive arthritis, skin nodules, and progressive soft tissue induration.
- Diagnostic biopsies revealed Congo red nonbirefringent deposits.
- Immunohistochemical staining confirmed the deposits were strongly positive for lambda light chains.
Findings:
- The observed deposits were definitively lambda light chains, not amyloid.
- The findings allowed for a clear distinction between LCDD and amyloid arthropathy.
- This case represents the first documented instance of significant musculoskeletal involvement in LCDD.
Implications:
- This case expands the known clinical spectrum of lambda light chain deposition disease.
- It underscores the importance of considering LCDD in patients with unexplained arthritis and soft tissue abnormalities.
- Further research may elucidate the mechanisms underlying LCDD-associated arthropathy and soft tissue disease.