An Imaging Agent (Pafolacianine) for Identifying Lesions in Pediatric Patients With Primary or Metastatic Solid Tumors

This study is testing an imaging dye called pafolacianine (Cytalux) in children and teenagers to help surgeons better identify solid tumor tissue during operations. The dye attaches to cancer cells and glows under special light, making tumors easier to see. **You may be eligible if...** - You are between 6 months and 17 years old - You have been diagnosed with — or are highly suspected to have — a solid tumor in the neck, chest, abdomen, pelvis, or limbs - You are scheduled for surgery to remove or biopsy the tumor - Your parent or guardian can provide written informed consent **You may NOT be eligible if...** - You have previously received pafolacianine (Cytalux) - You have had a severe allergic reaction (anaphylaxis) to products containing indocyanine green - You are allergic to any component of Cytalux - You received another investigational drug within the last 30 days Talk to your doctor to see if this trial is right for you.