A Study Comparing Green Fluorescent Dye and Radioactive Dye for Sentinel Lymph Node Biopsy in Pediatric Cancers

Inclusion Criteria: * Patients \<30 years old with an extracoelomic solid tumor, diagnosis confirmed at the enrolling institution, requiring SLN biopsy * Women of childbearing potential must have a negative pregnancy test (urine or blood) pre-operatively as per the standard hospital policy. A woman of childbearing potential is defined as one who is biologically capable of becoming pregnant. * Patients who are cleared for surgery Exclusion Criteria: * History of reaction to ICG, iodides, or technetium radiocolloid * Intracoelomic primary tumors or tumors expected to drain to an intracoelomic SLN * Patients with extensive prior surgery at the primary site or nodal basin expected to affect the lymphatic drainage * Patients unwilling or unable to sign informed consent * Women who are pregnant or breast-feeding