90Yttrium-Ibritumomab Tiuxetan as First Line Treatment for Follicular Non-Hodgkin Lymphoma. 5 Year Results from an International Multicenter Phase II Clinical Trial

Abstract Purpose Updated 5 year results are presented from the multicenter phase II trial of 90Yttrium-Ibritumomab-Tiuxetan (90YIT) as first line stand-alone therapy for patients with follicular lymphoma (FL). Patients and Methods 59 patients with CD20-positive FL grade 1 to 3a in stages II with bulky disease (n=12), III (n= 26), or IV (n=21), and in need for therapy, were enrolled between 05/2007 and 06/2010. They received 90YIT according to standard procedure (rituximab 250 mg/m2 days -7 and 0, then 90YIT 15 MBq/kg (0.4mCi/kg) day 0; patients with platelet counts below 150.000/ul but above 100.000/ul received only 11 MBq/kg). Primary end point was the clinical and molecular remission rate…