The purpose of this study is to test an experimental approach called cell therapy for neuroblastoma or retinoblastoma. This study will take a patient's own white blood cells (T cells) and change them to turn against the cancer. These cells are an experimental treatment and have not been approved by the FDA. CAR T cells have been used to treat other cancers, but GPC2 CAR T cells have not been administered to human patients prior to this clinical trial.

If they choose to participate in this study, active participation will last approximately 12 months. Participants will also be asked to sign consent to a separate long term follow-up protocol to monitor their health for up to 15 years after their last GPC2 CAR T treatment.

This study will assess the safety and effectiveness of GPC2 CAR T cells. Overall, approximately 45 subjects will be enrolled on this study.

CAR T cell therapy has shifted the treatment landscape for pediatric and young adult patients with advanced B-cell leukemias. This study aims to treat patients with relapsed disease by administering two CART cell products, huCART19 and CART22-65s. The study will determine the safety and efficacy and usefulness of administering two CAR T cell products in patients with advanced B-cell leukemias.

This is a Phase 1/2b trial for the treatment of patients with either advanced or refractory B cell Acute Lymphoblastic Leukemia or B-lineage lymphoblastic lymphoma. Possible procedures include medical record review, apheresis, huCART19 infusion, blood draws, physical exams, imaging, and disease assessments through bone marrows and lumbar punctures. Overall, approximately 93 subjects will be enrolled on this clinical trial.

This study enrolls patients that have been diagnosed with acute leukemia associated with a KMT2A (MLL) gene rearrangement (referred to as KMT2Arearranged, or KMT2A-R). The KMT2A-R leukemia has come back after treatment (relapsed) or is not responding to treatment (it is refractory). This study involves taking a study drug called SNDX-5613. The study is divided into two phases: one in which the study drug is given in combination with chemotherapy and a phase where the study drug is given alone. The purpose of the study is to test the safety of the study drug with chemotherapy, and how well the treatment regimen works for infants and young children with relapsed or refractory KMT2A-R leukemia.

This study involves an investigational cellular therapy called Afamitresgene Autoleucel. The overall goal of this study is to find out how safe and effective this cellular therapy is in treating people that have been diagnosed with synovial sarcoma, malignant peripheral nerve sheath tumors (MPNST), neuroblastoma or osteosarcoma that has grown or returned after being treated.

The purpose of this study is to determine the safety and tolerability of an experimental form of therapy, known as WU-CART-007 ("study drug"). WU-CART-007 uses immune cells, called T cells, that are genetically changed to identify cancer cells. In this study, T cells are collected from a healthy human donor and have been modified in a laboratory. If the genetically changed T cells recognize and attach to cancer cells, they may have the ability to kill those cancer cells.

Patients with T-cell Acute Lymphoblatic Leukemia (T-ALL) or Lymphoblastic Lymphoma (LBL), where the disease has come back (relapsed) or has not responded to treatment (refractory) may be eligible for the study.