IRVINE, Calif.--(BUSINESS WIRE)--Spectrum Pharmaceuticals, Inc. (NasdaqGM:SPPI), a commercial stage biotechnology company with a primary focus in oncology, today announced that clinical data on ZEVALIN (ibritumomab tiuxetan) was presented at the 51st Annual Meeting of the American Society of Hematology (ASH), which was held December 5-8, 2009 at the Ernest N. Morial Convention Center in New Orleans, Louisiana.