Testing the Addition of Daratumumab to Chemotherapy for Treating Patients With Newly-Diagnosed T-Cell Lymphoblastic Leukemia (T-ALL) and T-Cell Lymphoblastic Lymphoma (T-LL)

Inclusion Criteria: * All patients must be enrolled on APEC14B1 and consented to eligibility screening (part A) prior to treatment and enrolled on AALL2331. * Patients must be \> 365 days and \< 21 years of age at the time of diagnosis. * \* Newly diagnosed T-cell acute lymphoblastic leukemia (T-ALL) or T-lineage lymphoblastic lymphoma (T-LL) stages II-IV. * Note: A diagnosis of T-ALL is established when leukemic blasts lack myeloperoxidase or evidence of B-lineage derivation (CD19/CD22/CD20), and express either surface or cytoplasmic CD3 or two or more of the antigens CD8, CD7, CD5, CD4, CD2 or CD1a, and are present either in peripheral blood or \> 25% in the bone marrow. If surface CD3 is expressed on all leukemic cells, additional markers of immaturity, including TdT, CD34 or CD99 will be assessed for expression. Cases with uncertain expression will receive additional review within the appropriate Children's Oncology Group (COG) reference laboratory. * For T-LL patients with tissue available for flow cytometry, the criterion for diagnosis should be analogous to T-ALL. For tissue processed by other means (i.e. paraffin blocks), the methodology and criteria for immunophenotypic analysis to establish the diagnosis of T-LL defined by the submitting institution will be accepted. Exclusion Criteria: * Diagnosis of Down syndrome (trisomy 21). * Patients with known Charcot-Marie-Tooth disease. * \* Patients must not have received any cytotoxic chemotherapy for either the c…