A Study of CNCT19 Treatment in Children and Adolescent r/r ALL Patients(Pediatric)

This study tests a CAR-T cell therapy called CNCT19 for children and teenagers whose acute lymphoblastic leukemia (ALL) — a type of blood cancer — has come back or stopped responding to treatment. CAR-T therapy uses a patient's own immune cells, which are reprogrammed in a lab to find and destroy cancer cells. **You may be eligible if...** - You are 3 to 18 years old and weigh at least 10 kg - You have relapsed or refractory ALL (cancer came back or didn't respond to treatment) - Your cancer cells test positive for a protein called CD19 - Your bone marrow has at least 5% cancer cells at the time of screening - You have adequate organ function (heart, liver, kidneys) **You may NOT be eligible if...** - You have uncontrolled active infections - You have received certain other experimental treatments recently - Your cancer does not have the CD19 marker - You have severe organ dysfunction Talk to your doctor to see if this trial is right for you.