A primary nodal b-cell non-hodgkin lymphoma which morphologically resembles lymph nodes involved by marginal zone lymphomas of extranodal or splenic types, but without evidence of extranodal or splenic disease. this is a rare entity, and most patients present with localized or generalized lymphadenopathy. the clinical course is indolent. (who, 2001) check for "https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/c8863" active clinical trials using this agent. ("http://ncit.nci.nih.gov/ncitbrowser/conceptreport.jsp?dictionary=nci%20thesaurus&code=c8863" nci thesaurus)