Source:http://linkedlifedata.com/resource/umls/id/C0018854
NCI: A clonal disorder characterized by the secretion of a truncated gamma chain. In most cases, it is associated with morphologic changes also seen in lymphoplasmacytic lymphomas, but the clinical course is typically more aggressive than in lymphoplasmacytic lymphoma/Waldenstrom's macroglobulinemia. --2004