• Response rates [ Time Frame: 6 months ]
  Percent
• Adverse events [ Time Frame: 6 months ]
  Percent
• Disease free survival [ Time Frame: 6 months ]
  Months

The outcome of young adults (18-60 years) with ALL has been dramatically improved by the use of pediatric-inspired trials. About 60% of these young adult patients will be cured at 5 years. In this context, early evaluation of minimal residual disease (MRD) at complete remission has been shown to be one of the most powerful prognostic factor, but also predictive of the benefit of allogeneic stem cell transplantation (ASCT). Despite this global improvement, about 30% of patients experience a relapse and will be exposed to be refractory to salvage therapy or to early disease escape. In adult ALL, the most important prognostic factors at relapse are : the time from first CR to relapse, the achievement of a second complete remission (CR), and the feasibility of ASCT.

Blinatumomab is a bispecific T-cell engager that recruits T-cell on CD19 positive blast cells and induces anti-leukemic cytotoxicity. In a phase 3 trial in relapse/refractory Philadelphia-negative (Ph-) ALL, 43% of patients achieved a CR or CR with partial hematological recovery (CRh), with the majority of responses occurring within the first cycle. In patients with positive MRD (MRD+) BCP-ALL, blinatumomab resulted in complete MRD response in 78% of patients after one cycle.

Between 2012 and 2016, blinatumomab was available in France for R/R and MRD+ ALL adult patients through the French Compassionate Use Program. About 92 adult ALL were treated at different stages of the disease in 27 centers.

To evaluate the efficacy of blinatumomab given in the French Compassionate Use Program, in term of overall survival in both R/R (first cohort) and MRD positive (second cohort) patients.

To evaluate the efficacy of blinatumomab given in the French Compassionate Use Program, in term of CR/CRH in R/R patients, To evaluate the efficacy in term of molecular response in both R/R and MRD+ cohorts, To evaluate the efficacy of blinatumomab given in the French Compassionate Use Program, in both Ph+/Ph- ALL patients To evaluate the feasibility and the safety of blinatumomab administration in a multi-center setting.To evaluate the feasibility of allogeneic stem cell transplant after blinatumomab administration in both populations.

• Acute Lymphoblastic Leukemia, in Relapse
• Acute Lymphoblastic Leukemia With Failed Remission

• Relapse/Refractory
• MRD positive

• Dombret H, Cluzeau T, Huguet F, Boissel N. Pediatric-like therapy for adults with ALL. Curr Hematol Malig Rep. 2014 Jun;9(2):158-64. doi: 10.1007/s11899-014-0210-9. Review.
• Dhédin N, Huynh A, Maury S, Tabrizi R, Beldjord K, Asnafi V, Thomas X, Chevallier P, Nguyen S, Coiteux V, Bourhis JH, Hichri Y, Escoffre-Barbe M, Reman O, Graux C, Chalandon Y, Blaise D, Schanz U, Lhéritier V, Cahn JY, Dombret H, Ifrah N; GRAALL group. Role of allogeneic stem cell transplantation in adult patients with Ph-negative acute lymphoblastic leukemia. Blood. 2015 Apr 16;125(16):2486-96; quiz 2586. doi: 10.1182/blood-2014-09-599894. Epub 2015 Jan 13.
• Gökbuget N, Stanze D, Beck J, Diedrich H, Horst HA, Hüttmann A, Kobbe G, Kreuzer KA, Leimer L, Reichle A, Schaich M, Schwartz S, Serve H, Starck M, Stelljes M, Stuhlmann R, Viardot A, Wendelin K, Freund M, Hoelzer D; German Multicenter Study Group for Adult Acute Lymphoblastic Leukemia. Outcome of relapsed adult lymphoblastic leukemia depends on response to salvage chemotherapy, prognostic factors, and performance of stem cell transplantation. Blood. 2012 Sep 6;120(10):2032-41. Epub 2012 Apr 4.
• Topp MS, Gökbuget N, Stein AS, Zugmaier G, O'Brien S, Bargou RC, Dombret H, Fielding AK, Heffner L, Larson RA, Neumann S, Foà R, Litzow M, Ribera JM, Rambaldi A, Schiller G, Brüggemann M, Horst HA, Holland C, Jia C, Maniar T, Huber B, Nagorsen D, Forman SJ, Kantarjian HM. Safety and activity of blinatumomab for adult patients with relapsed or refractory B-precursor acute lymphoblastic leukaemia: a multicentre, single-arm, phase 2 study. Lancet Oncol. 2015 Jan;16(1):57-66. doi: 10.1016/S1470-2045(14)71170-2. Epub 2014 Dec 16. Erratum in: Lancet Oncol. 2015 Apr;16(4):e158.
• Gökbuget N, Dombret H, Bonifacio M, Reichle A, Graux C, Faul C, Diedrich H, Topp MS, Brüggemann M, Horst HA, Havelange V, Stieglmaier J, Wessels H, Haddad V, Benjamin JE, Zugmaier G, Nagorsen D, Bargou RC. Blinatumomab for minimal residual disease in adults with B-cell precursor acute lymphoblastic leukemia. Blood. 2018 Apr 5;131(14):1522-1531. doi: 10.1182/blood-2017-08-798322. Epub 2018 Jan 22. Erratum in: Blood. 2019 Jun 13;133(24):2625.
• Lee DW, Gardner R, Porter DL, Louis CU, Ahmed N, Jensen M, Grupp SA, Mackall CL. Current concepts in the diagnosis and management of cytokine release syndrome. Blood. 2014 Jul 10;124(2):188-95. doi: 10.1182/blood-2014-05-552729. Epub 2014 May 29. Erratum in: Blood. 2015 Aug 20;126(8):1048. Dosage error in article text. Blood. 2016 Sep 15;128(11):1533.

Inclusion Criteria:

Patient with Philadelphia-negative or positive (Ph+) ALL in relapse, refractory to salvage therapy, or with MRD positive ALL that received blinatumomab in the French ATU program.,

• Patient treated in the GRAALL network,
• Patient who does'nt object to participate in the study

Exclusion Criteria :

- none