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Cord Blood Transplant, Cyclophosphamide, Fludarabine, and Total-Body Irradiation in Treating Patients With High-Risk Hematologic Diseases

  • PhasePhase 2
  • StatusRecruiting
  • Planned enrollment54 people
  • Recruiting US sites1
  • SponsorFred Hutchinson Cancer Center
  • RegistryNCT06013423

Recruitment re-checked on ClinicalTrials.gov Oct 30, 2026. Public record; not medical advice.

Cord Blood Transplant, Cyclophosphamide, Fludarabine, and Total-Body Irradiation in Treating Patients With High-Risk Hematologic Diseases: a one-minute explainerNCT060134231 min

Eligibility

Who can join

The film gives the main points. The full list below is copied from the registry; the study team makes the final decision.

  • Age6 Months to 65 Years
  • SexAll
  • Healthy volunteersNo

You may be able to join if

  • Patients aged 6 months to =< 65 years at time of consent.
  • Acute myelogenous leukemia (AML):
  • Complete first remission (CR1), complete second remission (CR2) or greater (CR2+), must have < 5% marrow blasts at the time of transplant.
  • Patients in morphologic remission with persistent cytogenetic, flow cytometric, or molecular aberrations are eligible.
  • Acute lymphoblastic leukemia (ALL):
  • Complete first remission (CR1) at high risk for relapse such as any of the following:
  • Presence of any high-risk cytogenetic abnormalities such as t(9;22), t(1;19), t(4;11) or other MLL rearrangements (11q23) or other high-risk molecular abnormality.
  • Failure to achieve MRD- complete remission after induction therapy.
  • Persistence or recurrence of minimal residual disease on therapy.
  • Any patient unable to tolerate consolidation and/or maintenance chemotherapy as would have been deemed appropriate by the treating physician.
  • Other high-risk features not defined above.
  • Complete second remission (CR2) or greater (CR2+).
  • Note: ALL with less than 5% blasts at time of transplant but persistent cytogenetic, flow cytometric or molecular aberrations are eligible.
  • Other acute leukemias: Acute leukemias of ambiguous lineage or mixed phenotype with less than 5% blasts. Leukemias in morphologic remission with persistent cytogenetic, flow cytometric or molecular aberrations are eligible.
  • Chronic Myeloid Leukemia (CML): Excluding refractory blast crisis. To be eligible in first chronic phase (CP1) patient must have failed or be intolerant to tyrosine kinase inhibitor therapy.
  • Myelodysplastic syndromes (MDS) and myeloproliferative disorders (MPD) other than myelofibrosis:
  • MDS/MPD overlap syndromes without myelofibrosis.
  • MDS/ MPD patients must have less than 10% bone marrow myeloblasts and absolute neutrophil count (ANC) > 0.2 (growth factor supported if necessary) at transplant work-up.
  • Non-Hodgkin lymphoma (NHL) at high-risk of relapse or progression if not in remission:
  • Eligible patients with aggressive histology (such as, but not limited to, diffuse large B-cell NHL, mantle cell NHL, and T-cell histology) in CR by PET/CT imaging.
  • Eligible patients with indolent B-cell NHL (such as, but not limited to, follicular, small cell or marginal zone NHL) will have 2nd or subsequent progression with PR or CR by PET/CT imaging.
  • Blastic plasmacytoid dendritic cell neoplasm (BPDCN) in morphologic remission.
  • Only for adult patients, to prevent graft rejection, patients who received only non-lymphodepleting agents for their malignancy (hypomethylating agents, venetoclax, hydroxyurea, TKIs etc.), or patients who received lymphodepleting chemotherapy > 3 months prior to scheduled admission, may receive fludarabine 25 mg/m^2 daily x 3 days for lymphodepletion 14-42 days (aiming for 2-4 weeks) at the discretion of the principal investigator (PI).
  • For patients > 16 years old, Karnofsky score ≥ 70%. For patients =< 16 years old, Lansky score ≥ 50%.
  • Calculated creatinine clearance > 70 ml/min.
  • Bilirubin < 1.5 mg/dL (unless benign congenital hyperbilirubinemia or hemolysis).
  • Alanine transaminase (ALT) < 3 x upper limit of normal (ULN).
  • For patients > 18 years old, pulmonary function (spirometry and corrected diffusing capacity for carbon monoxide [DLCO]) > 60% predicted. For patients =< 18 years old, or any patient unable to perform pulmonary function tests, O2 saturation > 92% on room air.
  • Left ventricular ejection fraction > 50%.
  • Albumin > 3.0 g/dL.
  • For patients > 18 years old, Hematopoietic Cell Transplantation Comorbidity index (HCT-CI) =< 5.
  • UCB units will be selected according to current umbilical cord blood graft selection algorithm. One or two UCB units may be used to achieve the required cell dose.
  • The UCB graft is matched at 4-6 HLA-A, B, DRB1 antigens with the recipient. This may include 0-2 antigen mismatches at the A or B or DRB1 loci. Unit selection based on cryopreserved nucleated cell dose and HLA-A, B, DRB1 using intermediate resolution A, B antigen and DRB1 allele typing.

You cannot join if

  • Diagnosis of myelofibrosis or other malignancy with moderate-severe bone marrow fibrosis.
  • Patients persistent with central nervous system (CNS) involvement in cerebrospinal fluid (CSF) or CNS imaging at time of screening0
  • Prior checkpoint inhibitors/ blockade in the last 12 months.
  • Two prior stem cell transplants of any kind.
  • One prior autologous stem cell transplant within the preceding 12 months.
  • Prior allogeneic transplantation.
  • Prior involved field radiation therapy that would preclude safe delivery of 400cGy total body irradiation (TBI) in the opinion of radiation oncology.
  • Active and uncontrolled infection at time of transplantation.
  • HIV infection.
  • Inadequate performance status/ organ function.
  • Pregnancy or breast feeding.
  • Patient or guardian unable to give informed consent or unable to comply with the treatment protocol including appropriate supportive care, long-term follow-up, and research tests.

The treatment

How it is intended to work

This is how the treatment is meant to work. Whether it helps, and how safe it is, is what this trial is testing.

Treatments listed in the registry

  • Biospecimen Collection (Procedure): Undergo blood sample collection
  • Bone Marrow Aspirate (Procedure): Undergo bone marrow aspirate
  • Cyclophosphamide (Drug): Given IV
  • Cyclosporine (Drug): Given IV or PO
  • Diagnostic Imaging Testing (Procedure): Undergo diagnostic imaging
  • Echocardiography Test (Procedure): Undergo ECHO
  • Fludarabine Phosphate (Drug): Given IV
  • Multigated Acquisition Scan (Procedure): Undergo MUGA
  • Mycophenolate Mofetil (Drug): Given IV
  • Survey Administration (Other): Ancillary studies
  • Thiotepa (Drug): Given IV
  • Total-Body Irradiation (Radiation): Undergo high-dose or middle-intensity TBI
  • Umbilical Cord Blood Transplantation (Procedure): Undergo UCBT

The study

Treatment groups

Non Randomized · Single Group · masking: None

Arm I (myeloablative UCBT) (Experimental)

See detailed description.

Arm II (myeloablative UCBT) (Experimental)

See detailed description.

What it involves

Procedures

As the registry describes them. Requirements to join, such as a tissue sample, are in the eligibility list above even when on-study procedures are optional. Ask the study team which steps apply to you.

  • bone marrow: Part of the study plan
  • blood samples: Part of the study plan
  • echocardiogram: Described as optional
  • questionnaires: Part of the study plan

Goals

What the study measures

Main goals

  • Overall survival (At 1 year)

Other goals

  • Cumulative incidence of neutrophil and platelet engraftment
  • Incidences of graft failure
  • Incidence of grade II-IV and III-IV acute graft-versus-host disease (aGVHD)
  • Incidence of grade II-IV and III-IV aGVHD
  • Incidence of chronic graft-versus-host disease (cGVHD)
  • Organ distribution of GVHD
  • Incidence of adverse events
  • Time to immunosuppression cessation
  • Pattern of donor chimerism
  • Incidence of pre-engraftment syndrome (PES)
  • Incidence of transplant related mortality (TRM)
  • Incidence of relapse

Planned enrollment: 54 (estimated).

Where

Recruiting US sites

  • Fred Hutch/University of Washington Cancer Consortium, Seattle, Washington

Site status as of Oct 30, 2026. Check the live record before contacting a site.

Sources

Where this comes from

Registry record reviewed as fetched Oct 30, 2026, last updated by the sponsor Oct 25, 2026. Public record; not medical advice.

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