Primary localized amyloidosis

Primary localized amyloidosis is a form of AL amyloidosis caused by the aggregation of insoluble amyloid fibrils derived from misfolded monoclonal immunoglobulin light chains usually produced by a plasma cell tumor and characterized by localized amyloid deposition with clinical manifestations restricted to the organ involved, most frequently urinary tract (bladder), eye, respiratory tract (larynx, lungs), and skin.