Study of the Combination of Crizotinib and Dasatinib in Pediatric Research Participants With Diffuse Pontine Glioma (DIPG) and High-Grade Glioma (HGG)

This is a phase I study to find the highest tolerable dose of crizotinib and dasatinib given in combination to patients with diffuse intrinsic pontine glioma (DIPG) and other types of high grade gliomas (HGG). Participants will receive escalating doses until the highest dose is determined. Participants will be enrolled in two strata: stratum A for recurrent/ progressive tumors and stratum B for recently diagnosed patients who have completed standard radiation therapy without progressive disease. Up to 7 dosage levels will be tested. Both drugs are taken orally daily, once per day. Correlative pharmacokinetic and biology studies are planned, as well as advanced methods of magnetic resonance imaging (MRI).