About the Disease Diffuse intrinsic pontine glioma (DIPG) and diffuse midline glioma (DMG) are brain tumors that are typically diagnosed in children and can also be found in young adults. They make up around 10% of all pediatric brain tumors. Learn More Glossary It can sometimes be difficult to understand all of the terms often used throughout a DIPG or DMG diagnosis. We are here to help. Glossary