Tags: Disease.
A brainstem glioma is a cancerous glioma tumor in the brainstem.Around 75% are diagnosed in children and young adults under the age of twenty but have been known to affect older adults as well. Brainstem gliomas start in the brain or spinal cord tissue and typically spread throughout the nervous system. Brainstem gliomas are often primary brain tumors and rarely metastasize or spread to affect another part of the body.[citation needed]