RT Book, Section A1 Lichtman, Marshall A. A1 Kaushansky, Kenneth A1 Prchal, Josef T. A1 Levi, Marcel M. A1 Burns, Linda J. A1 Linch, David C. SR Print(0) ID 1189335812 T1 Myeloma T2 Williams Manual of Hematology, 10e YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264269204 LK hemonc.mhmedical.com/content.aspx?aid=1189335812 RD 2024/04/25 AB Myeloma is a malignancy of terminally differentiated B cells (plasma cells) that produces a complete monoclonal immunoglobulin (Ig) protein or a free light chain (FLC).Clinical and laboratory manifestations are heterogeneous but typically include:— A monoclonal Ig in plasma and/or monoclonal light chains in plasma and urine. In rare cases, the cells do not secrete a monoclonal protein in the plasma.— Decreased polyclonal Ig secretion by residual normal plasma cells, which predisposes to infections.— Hypercalcemia as a result of osteolysis.— Renal dysfunction as a result of light chain casts or hypercalcemia.— Myeloma cell proliferation in marrow leading to impaired hematopoiesis.— Osteolytic bone disease.