Sodium Fluorescein-Guided Resection of Pediatric Neurosurgical Tumors

Inclusion Criteria: * Age 31 days through 21 years on date of surgery * Undergoing resection of a central nervous system tumor at Children's Hospital Colorado * Parent/legal guardian (or adult subject) willing and able to complete the informed consent process Exclusion Criteria: * Tumor in functionally eloquent cortex that precludes maximal surgical resection * Severe renal dysfunction * Preoperative serum creatinine level \> than normal range and GFR \< 30. * Severe liver dysfunction * History of asthma or pulmonary spasm * Known allergy to sodium fluorescein or any other contrast dye * Previous administration of sodium fluorescein within the last 72 hours * Pregnant or nursing mother * Other unspecified reasons that, in the opinion of the investigator, make the subject unsuitable for enrollment.