<prompt> Features of multiple myeloma areB cell monoclonal proliferationB cell in bone marrowB cell in peripheral bloodPlasma cell secretes immunoglobulin  <response>: Multiple myeloma is a malignant proliferation of plasma cells. Normal plasma cells are derived from B cells prodece immunoglobulins which contain heavy light chains. Normal immunoglobulins are polyclonal,which means that a variety of heavy chains are produced . In myelona,plasma cells produce immunoglobulin of a single hwavy light chain , a monoclonal protein commonly referred to as a paraprotein.Reference :Davidsons principles practice of medicine 22nd edition pg no 1046. 