Personalized Therapy of Precursor Lymphoid Neoplasms

Optimization of the Treatment of Adults With Precursor Lymphoid Neoplasms With Adjustment of the Type and Intensity of the Therapy for Age, Status of Minimal Residual Disease, Genetic and Phenotypic Features

The primary goal of this study by The Polish Adult Leukemia Group (PALG) is to verify if individual therapeutic approach taking into account biological and phenotypic differences as well as response at the level of minimal residual disease is associated with improved outcome of adults with precursor lymphoid neoplasms

Between 1997-2010 the PALG run three prospective studies. In the most recent PLAG 5-2007 protocol attempts have been made to individualize treatment. In particular, stratification to high and standard risk group was based on both conventional clinical criteria and the level of MRD after induction and consolidation. Patients with unsatisfactory response were referred for allogeneic hematopoietic stem cell transplantation (alloHSCT). Interim analysis showed significant improvement compared to previous PALG 4-2002 protocol with regard to both overall survival and leukemia-free survival. The reasons of failure were relapses and non-relapse mortality (NRM) associated with alloHSCT. In the current protocol we intend to further adjust the therapy for individual patients needs. We assume that this way we will be able to reduce the risk of relapse and NRM and improve the cure rate. All patients will receive multiagent induction and consolidation chemotherapy. The type and intensity of the therapy, as well as indications for allogeneic and autologous HSCT will depend on age, status of MRD, immunophenotype and the presence of BCR/ABL fusion gene.

Acute lymphoblastic leukemia, Induction, Consolidation, Minimal residual disease, Hematopoietic stem cell transplantation

Induction, consolidation, HSCT, maintenance for adults with newly diagnosed precursor lymphoid neoplasms

Patients <55 years Ph-neg.: induction (daunorubicin, prednisone, vincristin, PEG-asparaginase), 2nd induction (if non-remission or MRD>0.1%; FLAM, MiniFLAM or FLAM-CAMP dependent on age and phenotype), consolidation (methotrexate, etoposide, cytarabine, cyclophosphamide, PEG-asparaginase). If MRD <0.01%: autoHSCT + maintenance (mercaptopurine, methotrexate) or multiagent maintenance (additionally daunorubicin, vincristin, prednisone); remaining patients: alloHSCT. Prophylaxis of leptomeningeal involvement: liposomal cytarabine intrathecally. Patients >55 years, Ph-neg.: as above, reduced doses. AlloHSCT with reduced conditioning. Patients Ph-pos.: as above, reduced doses in combination with continues imatinib. All intended for alloHSCT.

Inclusion Criteria: New diagnosis of PLN according to WHO 2008 classification Age ≥18 years Biological status allowing administration of induction therapy Informed patient consent form signed Exclusion Criteria: Pregnancy Psychiatric diseases History of other malignancies HIV infection Active hepatitis Hypersensitivity to drugs used in induction

Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland

Holowiecki J, Krawczyk-Kulis M, Giebel S, Jagoda K, Stella-Holowiecka B, Piatkowska-Jakubas B, Paluszewska M, Seferynska I, Lewandowski K, Kielbinski M, Czyz A, Balana-Nowak A, Krol M, Skotnicki AB, Jedrzejczak WW, Warzocha K, Lange A, Hellmann A. Status of minimal residual disease after induction predicts outcome in both standard and high-risk Ph-negative adult acute lymphoblastic leukaemia. The Polish Adult Leukemia Group ALL 4-2002 MRD Study. Br J Haematol. 2008 Jun;142(2):227-37. doi: 10.1111/j.1365-2141.2008.07185.x. Epub 2008 May 19.