Transthyretin Cardiac Amyloidosis Disguised as Light Chain Amyloidosis or Multiple Myeloma?

We describe 2 challenging cases of cardiac transthyretin amyloidosis initially treated as cardiac amyloidosis light chain in the setting of active myeloma. Endomyocardial biopsy with mass spectrometry was essential to confirm the appropriate diagnosis to direct the treatment.
Competing Interests: Declaration of Competing Interest The authors have no competing interest to declare.
(Published by Elsevier Inc.)