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.

The purpose of this research study is to determine if certain markers in your blood are increased over the duration of your chemotherapy, especially as you get sicker, such as developing a severe infection (sepsis) or severe respiratory failure (acute respiratory distress syndrome).

This study involves taking a study drug called SAR443579. The overall goal of this study is to find out if the study drug is safe and effective at treating adults and children with relapsed or refractory acute myeloid leukemia (R/R AML), high risk myelodysplastic syndrome (HR-MDS), or B-cell acute lymphoblastic leukemia (B-ALL). This is a first-in-human research study.

This study has two parts. Part A enrolls patients who have been diagnosed with a solid tumor, lymphoma or desmoid tumor that has either come back ("relapsed") or does not respond to therapy ("is refractory"). Part B enrolls patients with a relapsed or refractory Ewing sarcoma, desmoid tumor, osteosarcoma, liver tumor, Wilms tumor, or tumors with changes in a gene family known as the Wnt pathway. This study involves taking a study drug called tegavivint. The study will be testing different doses of the study drug to find the safest dose.