Safety and Feasibility of Intraoperative Visualization With Cytalux in Children

This trial is testing a fluorescent dye called Cytalux in children aged 6–17 who are having lung surgery to remove suspected cancer tumors (metastases). The dye helps surgeons see tumors more clearly during the operation. **You may be eligible if...** - Your child is between 6 and 17 years old and weighs at least 20 kg - Your child has a confirmed diagnosis of osteosarcoma, Ewing sarcoma, rhabdomyosarcoma, synovial sarcoma, hepatoblastoma, Wilms tumor, or other soft tissue sarcoma - Scans have shown suspected lung metastases (with at least one nodule 4 mm or larger), and lung surgery is planned - A parent or guardian is willing to provide written consent **You may NOT be eligible if...** - Your child has had an allergic reaction to indocyanine green (a similar dye) before - Your child has a medical condition that could make participation unsafe Talk to your doctor to see if this trial is right for you.