Donor Stem Cell Transplant With Treosulfan, Fludarabine, and Total-Body Irradiation for the Treatment of Hematological Malignancies

Inclusion Criteria: * Acute leukemia (AL) that includes acute myeloid leukemia (AML) / acute lymphoblastic leukemia (ALL) / mixed phenotype leukemia (MPAL) in complete morphological remission (CR) with or without detectable minimal residual disease (MRD); complete morphological remission is defined by the presence of less than 5% of detectable blasts in bone marrow specimen, evaluated per standard of care. Patients with documented CR but without hematologic recovery since last chemotherapy are considered eligible to the study * Chronic myelogenous leukemia (CML), except refractory blast crisis. To be eligible in first chronic phase, patients must have failed or be intolerant to at least one tyrosine-kinase inhibitor * Chronic myelomonocytic leukemia (CMML) * Myelodysplastic syndromes (MDS) * Lymphoblastic, Burkitt's and other high-grade lymphoma in any complete (CR) or partial (PR) response * CR and PR are defined according to Lugano classification: Recommendations for Initial Evaluation, Staging, and Response Assessment of Hodgkin and Non-Hodgkin Lymphoma: The Lugano Classification * Low grade lymphoma (chronic lymphocytic leukemia \[CLL\]/small lymphocytic lymphoma \[SLL\], marginal zone lymphoma, follicular lymphoma) progressed after two treatment regimens, in CR/PR * For CLL/SLL, CR and PR are defined according to: International Workshop on CLL (iwCLL) guidelines for diagnosis, indications for treatment, response assessment, and supportive management of CLL * CR …