ALBERT

Description: Background Follicular lymphoma (FL) is a disease with very heterogeneous course ranging from the indolent forms to rapidly progressive cases with poor outcome. Optimal therapy in FL patients with high tumor burden is immunochemotherapy (R-CHOP is the most frequent regimen used), followed by maintenance treatment. Data from randomized prospective studies (PRIMA) showed poorer outcome in those with high risk disease in terms of lower CR rate, higher risk of relapse and lower efficacy of maintenance therapy. Data comparing up-front intensive approach in younger fit patients and R-CHOP are limited. Aim To analyze long term results of intensive treatment protocol (R-sequential chemotherapy) in comparison with age, FLIPI and maintenance delivery matched (R-CHOP) controls. Methods Here we analyzed data of 48 prospectively enrolled FL patients who were treated by sequential (R-SQ) chemotherapy with or without up-front autologous stem cell transplant (ASCT) as a part of stratified risk adapted treatment in one institution. For R-SQ regimen were indicated patients3mg/L and/or thymidine kinase〉15 IU/L) or HIGH-FLIPI patients (irrespective of additional risk factors). R-SQ protocol consists of alternating three cycles of etoposide-doxorubicine regimen (PACEBO), one methotrexate-ifosfamide regimen (IVAM), and one cycle of high dose cytarabine regimen (HAM). Remission was consolidated with 6th cycle of chemotherapy (PACEBO) in INT-FLIPI patients (n=22, 46%) or with ASCT with BEAM-200 conditioning (n=26, 54%) in HIGH-FLIPI patients. Maintenance immunotherapy was applied for historical reasons in 24 patients (50%). Controls were randomly selected from the Czech Lymphoma Study Group (CLSG) database from 626 cases with confirmed FL grade I to IIIa, treated with R-CHOP. Pair matching was performed on 1:3 basis, controls were matched by age, FLIPI and rituximab maintenance application. In the end, we analyzed intensive SQ-group (n=44) and standard control R-CHOP-group (n=144). Maintenance therapy was delivered to 24 patients (50%) in R-SQ group and to 72 patients (50%) in R-CHOP-group (P=1.00). Results Median age of SQ-group was 47.6 years compared to 48.7 years in R-CHOP (P=0.44), FLIPI index was equally distributed: INT-FLIPI (43% vs 43%), HIGH-FLIPI (57% vs 57%, P=1.00). Treatment response quality was higher in SQ-group than in R-CHOP-group: CR/CRu 93.8% vs 70%, PR 6.2% vs 23% and SD/PD 0% vs 8% respectively (P=0.01). During the follow-up, (median 3.5 and 6.1 years in R-CHOP and SQ-group respectively, P