<prompt> In lymphoplasmacytoid lymphoma which of the following monoclonal immunoglobulin is seen ?IgAIgDIgGIgM  <response>: Waldenstrom macroglobulinaemia is a low grade lymphoplasmacytoid lymphoma associated with an Ig M paraprotein causing clinical features of hyperviscosity syndrome.Reference:Davidsons principles practice of medicine 22nd edition pg no 1045 