Response-Adapted Postinduction Strategy in Patients With Advanced-Stage Follicular Lymphoma: The FOLL12 Study.

Purpose: We compared 2 years of rituximab maintenance (RM) with a response-adapted postinduction approach in patients with follicular lymphoma who responded to induction immunochemotherapy.
Methods: We randomly assigned treatment-naïve, advanced-stage, high-tumor burden follicular lymphoma patients to receive standard RM or a response-adapted postinduction approach on the basis of metabolic response and molecular assessment of minimal residual disease (MRD). The experimental arm used three types of postinduction therapies: for complete metabolic response (CMR) and MRD-negative patients, observation; for CMR and MRD-positive (end of induction or follow-up) patients, four doses of rituximab (one per week, maximum three courses) until MRD-negative; and for non-CMR patients, one dose of ibritumomab tiuxetan followed by standard RM. The study was designed as noninferiority trial with progression-free survival (PFS) as the primary end point.
Results: Overall, 807 patients were randomly assigned. After a median follow-up of 53 months (range, 1-92 months), patients in the standard arm had a significantly better PFS than those in the experimental arm (3-year PFS 86% v 72%; P < .001). The better PFS of the standard versus experimental arm was confirmed in all the study subgroups except non-CMR patients (n = 65; P = .274). The 3-year overall survival was 98% (95% CI, 96 to 99) and 97% (95% CI, 95 to 99) in the reference and experimental arms, respectively ( P = .238).
Conclusion: A metabolic and molecular response-adapted therapy as assessed in the FOLL12 study was associated with significantly inferior PFS compared with 2-year RM. The better efficacy of standard RM was confirmed in the subgroup analysis and particularly for patients achieving both CMR and MRD-negative.
Competing Interests: Stefano LuminariConsulting or Advisory Role: Roche, Gilead Sciences, Celgene, Genmab, Regeneron, IncyteTravel, Accommodations, Expenses: Janssen, Celgene Sara GalimbertiSpeakers' Bureau: Novartis Italy, Jazz Pharmaceuticals, Incyte, AbbVieTravel, Accommodations, Expenses: Jazz Pharmaceuticals, Janssen Oncology, Incyte, Novartis Italy Annibale VersariConsulting or Advisory Role: NovartisTravel, Accommodations, Expenses: Novartis Alessandra TucciConsulting or Advisory Role: Janssen, TakedaTravel, Accommodations, Expenses: Sandoz Luigi MarcheselliUncompensated Relationships: Sandoz SpA Simone FerreroConsulting or Advisory Role: Janssen-Cilag, EUSA Pharma, Clinigen Group, IncyteSpeakers' Bureau: Janssen-Cilag, Servier, EUSA Pharma, GentiliResearch Funding: Gilead Sciences (Inst), MorphoSys (Inst), Janssen (Inst)Travel, Accommodations, Expenses: Roche, Servier, Sanofi, Janssen-Cilag, EUSA Pharma, Gentili Luca ArcainiConsulting or Advisory Role: Roche, Janssen-Cilag, Verastem, Incyte, EUSA Pharma, Celgene/Bristol Myers SquibbSpeakers' Bureau: EUSA PharmaResearch Funding: Gilead SciencesTravel, Accommodations, Expenses: Roche, Celgene, Janssen-Cilag, EUSA Pharma Federica CavalloHonoraria: ServierConsulting or Advisory Role: Gilead Sciences, RocheTravel, Accommodations, Expenses: Celgene Tetiana SkrypetsHonoraria: Takeda Ilaria del GiudiceConsulting or Advisory Role: Tolero Pharmaceuticals, AstraZeneca Stephane ChauvieStock and Other Ownership Interests: DixitHonoraria: Sirtex MedicalSpeakers' Bureau: TERUMO, Sirtex MedicalResearch Funding: Roche Antonello PintoHonoraria: Roche/Genentech, Merck Sharp & Dohme, Bristol Myers Squibb, Celgene, Servier, IncyteConsulting or Advisory Role: Servier, Roche/Genentech, Merck, TakedaSpeakers' Bureau: Roche/Genentech Marco LadettoHonoraria: AbbVie, Amgen, ADC Therapeutics, BeiGene, Celgene, Gentili, Kite/Gilead, Novartis, Incyte, Janssen, Jazz Pharmaceuticals, Regeneron, RocheConsulting or Advisory Role: Jazz Pharmaceuticals, Roche, Janssen, Regeneron, Gilead Sciences, Novartis, IncyteSpeakers' Bureau: IncyteResearch Funding: ADC Therapeutics (Inst), Janssen (Inst) Annalisa ChiarenzaConsulting or Advisory Role: Roche/Genentech Annalisa ArcariConsulting or Advisory Role: Janssen-CilagTravel, Accommodations, Expenses: Janssen-Cilag, Takeda Massimo FedericoConsulting or Advisory Role: Takeda, Menarini, Erytech Pharma, MedivationTravel, Accommodations, Expenses: Takeda Pharmaceutical Taiwan, LTDNo other potential conflicts of interest were reported.