Cord Blood Transplant in Children and Young Adults With Blood Cancers and Non-malignant Disorders

This study is offering cord blood transplants — a type of stem cell transplant using blood collected from umbilical cords after birth — to children and young adults with blood cancers or non-cancerous blood disorders who do not have a matched donor available. Cord blood transplants can expand access to life-saving transplants for patients without a suitable bone marrow match. **You may be eligible if...** - You are 21 years old or younger - You do not have a suitable matched related or unrelated bone marrow donor available in time - You have been diagnosed with leukemia (AML or ALL) in remission or relapse, myelodysplastic syndrome, lymphoma, sickle cell disease, thalassemia, or another serious blood disorder - Specific disease and remission status requirements vary — your transplant team will assess eligibility **You may NOT be eligible if...** - You have a suitable matched related or unrelated donor available - Your disease is too advanced or uncontrolled to safely proceed to transplant - You have significant organ function problems that make transplant too dangerous Talk to your doctor to see if this trial is right for you.