Multiple Myeloma Multiple Myeloma is a malignant disease of bone marrow plasma cells, accounting for 1% of all malignant disease. There is a clonal expansion of abnormal, proliferating plasma cellsproducing a monoclonal paraprotein, mainly IgG (55%) or IgA (20%), and rarely IgM and IgD. The paraproteinaemia may be associated with excretion of light chains in […]