TTR and amyloidosis: In our series, the distribution of the various amyloidosis types by means of IHC is reported in Table 3, including ALλ (n = 60, 46.2%), ATTR (n = 29, 22.3%), AA (n = 19, 14.6%), ALκ (n = 18, 13.9%), ALys (n = 2, 1.5%), and β2 microglobulin amyloidosis (Aβ2M, n = 2, 1.5%).