Ferumoxytol in Magnetic Resonance Imaging of Pediatric Patients With Brain Tumors

This phase II trial studies ferumoxytol in the magnetic resonance imaging of pediatric patients with brain tumors. Magnetic resonance imaging using ferumoxytol may help in viewing a brain tumor and blood vessels in and around the tumor in a different way than the standard gadolinium-based contrast agent. Imaging with this experimental contrast agent may give doctors more information about tumor blood supply and the extent of the tumor itself.