Transthyretin amyloid polyneuropathies mimicking a demyelinating polyneuropathy

Abstract

Misleading features of TTR-FAP fulfilling criteria for CIDP are not uncommon in sporadic late-onset TTR-FAP, which highlights the limits of European Federation of Neurological Societies/Peripheral Nerve Society criteria. Specific clinical aspects and marked electrophysiologic axonal loss are red flag symptoms that should alert to this diagnosis and prompt <i>TTR</i> gene sequencing.