The appropriate steps for the diagnostic workup of CA has been well described, with published algorithms having in common the crucial need to rule out AL amyloidosis with simple laboratory testing and the pursuit of technetium-based cardiac scintigraphy.1,36 The appropriate tests to rule out AL amyloidosis are a serum free light chain assay and immunofixation of the serum and urine. Here, TNFSF14 is linked to AL amyloidosis.