This study investigates the safety of an investigational medication in children who have solid tumors that have returned or are not responding to treatment. Solid tumors are abnormal masses of tissue that can occur in various parts of the body, including the brain and spinal cord, which are part of the central nervous system (CNS).
Participants in the study will receive the investigational medication. Their health will be closely monitored to observe any side effects or changes in their condition. This process is important to ensure the safety of the medication for children with these types of tumors.
- Who can participate: Children with recurrent or refractory solid tumors, including CNS tumors, can participate. They must have measurable or evaluable disease and no other treatment options. Participants must have a performance status of at least 50% on the Karnofsky or Lansky scale, depending on age.
- Study details: Participants will receive an investigational medication. A placebo, which is an inactive substance that looks like the investigational medication but does not contain any medicine, is not mentioned in this study.

