The most common are: light-chain (AL) amyloidosis associated with the presence of multiple myeloma [5] and cardiac transthyretin amyloidosis (ATTR), either wild-type (non-mutated) transthyretin (ATTRwt) or variant transthyretin (ATTRv) [6]. Here, TTR is linked to Familial transthyretin-related amyloidosis.