“…Various hematologic malignancies secrete monoclonal immunoglobulins and light chains (LCs), which are an important cause of kidney disease. 4 , 18 , 54 , 55 , 56 , 57 , 58 Clonal plasma cells or B-cell disorders that produce these paraproteins are collectively known as dysproteinemias, which include multiple myeloma, lymphoproliferative disorders, and monoclonal gammopathy of renal significance. These secreted paraproteins may form crystals and cause crystal-related kidney injury that may involve various parts of the nephron including the preglomerular capillaries, glomeruli, and tubular system, ranging from the proximal tubules to the cortical collecting ducts.…”