First case of cardiac amyloidosis presenting as right atrial mass

Intracardiac masses can be encountered during the evaluation of patients with cardiac symptoms; myxoma, primary and metastatic neoplasms, thrombus, and vegetation should be considered in the differential diagnosis in such cases. Intracardiac masses can cause symptoms such as embolization, heart failure, valvular regurgitation, arrhythmia, and pericardial effusion. Although some of the symptoms may overlap, cardiac amyloidosis (CA) is not an expected diagnosis when investigating an intracavitary mass. Different from the previously reported cases, we report the case of a patient with CA who presented with a unique right atrial mass.