Keywords: AL, light chain amyloidosis; ATTR, transthyretin amyloidosis; FLC, free light chain; IFE, immunofixation electrophoresis; KLR, kappa:lambda ratio; PyP, technetium pyrophosphate; SFLC, serum free light chain; SPEP, serum protein electrophoresis; UPEP, urine protein electrophoresis; amyloidosis; diagnosis; screening.