Quadruple Immunotherapy for Neuroblastoma

This study is testing a four-part immunotherapy combination for children with neuroblastoma (a childhood cancer of the nervous system) that has relapsed (come back) or stopped responding to treatment, using natural killer (NK) cells from a partially matched donor along with other immune-boosting drugs. **You may be eligible if...** - You (or your child) have relapsed or refractory neuroblastoma - Organ function meets the required levels (kidneys, liver, heart, oxygen levels) - A suitable half-matched NK cell donor is available - Performance status is sufficient for treatment (Karnofsky or Lansky score ≥50) **You may NOT be eligible if...** - You are pregnant or breastfeeding - You have HIV - Conventional treatment options are still available and expected to be curative - Organ function does not meet the required minimums Talk to your doctor to see if this trial is right for you.