Fig. 2

Images of Case 2. A Transesophageal echocardiogram and contrast-enhanced computed tomography revealed a 9 mm pedunculated mobile mass on the left atrial wall next to the left atrial appendage. B Pathology of the left atrial mass showed diffuse interstitial amyloid deposits (by Hematoxylin-Eosin and direct fast scarlet staining) positive for atrial natriuretic peptide, as well as nodular amyloid deposits positive for transthyretin. C ^99mTechnetium-pyrophosphate scintigraphy showed no significant myocardial uptake, and cardiac magnetic resonance showed no ventricular late gadolinium enhancement but slight gadolinium enhancement in the left atrial walls