These covered major amyloidosis types (ATTR (n = 9), ALλ (n = 5), ALκ (n = 2), AA (n = 3)) with an unequivocal diagnosis based on IHC (also including a mixed amyloidosis (ALκ/ATTR, n = 1)) or the histological context (calcitonin amyloidosis in medullary thyroid carcinoma (ACal, n = 3)). This evidence concerns the gene TTR and amyloidosis.