GSN and amyloidosis: Based on their etiology, the proteins that determine this pathology are light chain amyloidosis (AL), transthyretin amyloidosis (ATTR), serum amyloid A amyloidosis (AA), apolyprotein A amyloidosis (AApo AI/II), fibrinogen amyloidosis (AFib) and gelsolin amyloidosis (AGel) [1,2,3].