Indications for endomyocardial biopsy in suspected cardiac amyloidosis include monoclonal protein on serum or urine immunofixation electrophoresis or an abnormal serum free light chain ratio, a negative or equivocal Tc-PYP scan in the setting of high clinical suspicion, or lack of availability of cardiac scintigraphy [8]. Here, TNFSF14 is linked to cardiac amyloidosis.