Light Chain Deposition Disease
Light-chain deposition disease (LCDD) is the deposition of monoclonal light chains in multiple organs. It is a rare disease characterized by deposition of NONAmyloid immunoglobulin light chains, and they do not stain with Congo red and do not exhibit a fibrillar structure when examined ultrastructurally. It is categorized as a “monoclonal deposition disease” in the World Health Organization classification of tumors of hematopoietic and lymphoid tissues. LCDD was first described in 1976 in two patients with end-stage renal disease as granular deposits of free light chains in multiple organs, including the kidneys, that did not stain with Congo red.