Regarding the monitoring of ATTRv amyloidosis progression after disease onset, novel tests and assessments are being explored, such as urinary transthyretin [98], intraepidermal nerve fiber density [46, 99], nerve ultrasound [100], metabolomics analysis [101], serum inflammation markers [102], corneal confocal microscopy and electroretinogram [103], plasma neurofilament light chain [104], and gait parameter analysis [105]. Here, TTR is linked to familial amyloid neuropathy.