Diagnostic challenges in hereditary transthyretin amyloidosis with polyneuropathy: Avoiding misdiagnosis of a treatable hereditary neuropathy

amyloid polyneuropathy; chronic inflammatory demyelinating polyradiculoneuropathy; peripheral neuropathy; transthyretin; Adult; Aged; Aged, 80 and over; Amyloid Neuropathies, Familial; Biopsy; Delayed Diagnosis; Diagnostic Techniques, Neurological; Female; Humans; Immunoglobulin Light-chain Amyloidosis; Logistic Models; Lumbar Vertebrae; Male; Middle Aged; Multivariate Analysis; Neural Conduction; Paraproteinemias; Peripheral Nervous System Diseases; Polyradiculoneuropathy, Chronic Inflammatory Demyelinating; Prealbumin; Radiculopathy; Retrospective Studies; Spinal Puncture; Spinal Stenosis; Diagnostic Errors