This study investigates the effects of an investigational medication, given with or without an additional agent, on younger patients with solid tumors or sarcomas that have either returned after treatment or do not respond to treatment. Solid tumors are masses of tissue that can occur in various parts of the body, and sarcomas are a type of cancer that arises from connective tissues such as bone or muscle. The study aims to find the best dose and understand the side effects of the treatment.
Participants in this study will receive either the investigational medication alone or in combination with an additional agent. The study will monitor for side effects and determine the most effective dose. Participants will undergo various medical assessments to evaluate the treatment's impact on their condition.
- Who can participate: Patients aged 18 and under must have a confirmed diagnosis of solid tumors or sarcomas that are recurrent or refractory. They should have recovered from previous cancer treatments and must not have previously received the investigational medication. Pregnant or breastfeeding women, and those with certain medical conditions, are not eligible.
- Study details: Participants will receive the investigational medication, either alone or with an additional agent. A placebo, which is an inactive substance, will not be used in this study. The study will involve monitoring the patients for any side effects and assessing the optimal dosage.

