In the current retrospective analysis, nine patients with relapsed grade 1 and 2 FL, responding to FCR regimen and consolidated with 90 Y-RIT obtained a significant high rate of response with 100% of CR and acceptable toxicity. BMS-354825 mw After a median observation period of 34 months 6/9 patients were alive in CR and 7/9 were already treated with at least two prior regimens. Two patients converted PR to CR after consolidation with 90 Y-RIT. This conversion was already shown in published phase III study (FIT-study) in first-line FL [3, 4], and in previous phase II studies of consolidation

with the radioimmunotherapy agent 131 I-tositumomab after first-line induction [8, 9], confirming the ability of 90 Y-RIT to improve responses also in patients who are pretreated with rituximab based combination therapy [3]; even if in our two patients there is no proof that this conversion was due to RIT and not to a late response to FCR. In the FIT study close to 17% of the patients in the control arm, converted from PR to CR during watchful waiting [3], but it is to be considered that our two patients had higher risk of resistance being already pretreated. In our analysis the OS at 2 years was 89%, at 3 years 76% and at 4

years 61%. In another study conducted on patients with recurrent FL, treated INK 128 datasheet with FCR, a 75% OS rate at 4 years and a 61% PFS rate at 4 years were registered, but in that study only

7% of patients had been treated previously with rituximab and furthermore no patients had received combination treatment with chemotherapy plus rituximab [10]. Regarding AEs there was a high incidence of neutropenia and thrombocytopenia but hematologic toxicities grade 3 or 4 did not require transfusion but growth factor support was utilized in the majority of patients during FCR treatment, and in all of them after 90 Y-RIT. Despite the high incidence of grade 3 or 4 neutropenia there were no Rebamipide patients requiring hospitalization for infection. We registered a case of herpes zoster infection after 8 months following valacyclovir discontinuation that disappeared after retreatment, and a case of fungal infection by conidiobolus, developed 10 months after 90 Y-RIT and disappeared with itraconazole treatment. Other previous studies have already shown the low percentage of patients requiring hospitalization for infections [3, 5] and a favorable safety profile [11, 12]. A case of t-MDS with complex karyotype was diagnosed 26 months after 90 Y-RIT consolidation: this patient received 3 previous regimens before FCR plus 90 Y-RIT, as already mentioned he died for sepsis. This patient had been previously treated with topoisomerase II inhibitors, alkylating agents and purine nucleoside analogs. Czuczman et al.