Systemic Immunoglobulin Light Chain Amyloidosis-Associated Myopathy: Presentation, Diagnostic Pitfalls, and Outcome

Immunoglobulin light chain amyloidosis-associated myopathy is rare. Delay in diagnosis is common, and there is a high rate of pathologic and clinical misdiagnosis. Awareness of elevation of cardiac troponin T levels in the absence of cardiac disease may be a clue to diagnosis.