<prompt> Plasmacytoid lymphomas may be associated with an increase inIgGIgMIgAIgE  <response>: Lymphoplasmacytic lymphomas are otherwise called as plasmacytoid lymphomas or immunocytomas. It is a mature B cell neoplasm of older adults 60-70yearsBone marrow shows small lymphoid cells and admixed plasma cellsThese plasma cells secrete monoclonal IgMIgM can cause a hyperviscosity syndrome called Waldenstrom;s macroglobulinemia.Ref: Robbins 8e p612 