1-3 Misfolded free light chains are cytotoxic and aggregate into fibrils that deposit in target organs, notably in the heart and kidneys.1,2,4 The disease is rapidly progressive, with high early mortality when diagnosed in advanced stages.5-7 Cardiac involvement, the primary determinant of prognosis staged by serum biomarkers of myocardial injury, is common.8,9 Approximately 79% and 21% of patients with AL amyloidosis have lambda and kappa light chain isotypes, respectively.10-12 The organ...