Pediatric Brain Tumors

What it is

Overview

Brain and central nervous system tumors are the most common solid tumors in children. They encompass a wide range of tumor types — from low-grade gliomas (often curable) to highly aggressive tumors like DIPG. Treatment is complicated by the need to protect a developing brain, making pediatric neuro-oncology one of the most challenging fields in medicine.

Biology

How It Develops

Pediatric brain tumors arise from different cell types — astrocytes, oligodendrocytes, ependymal cells, or embryonic cells — with distinct mutations. Many childhood brain tumors harbor specific driver mutations (e.g., BRAF fusions in low-grade gliomas, H3K27M in DIPG) that are targets for new therapies. Location within the brain often determines treatment difficulty more than tumor type alone.

Warning signs

Symptoms

• —Headaches, especially in the morning
• —Vomiting without nausea
• —Vision, hearing, or speech problems
• —Balance problems or clumsiness
• —Seizures
• —Personality or behavior changes
• —Head size increase (in infants)

Detection

Diagnosis Methods

• —MRI of the brain and spine with contrast
• —CT scan
• —Surgical biopsy or tumor resection
• —Molecular and genetic tumor profiling
• —Cerebrospinal fluid analysis

Medical care

Treatment Options

• —Surgery (extent depends on tumor location)
• —Radiation therapy (3D conformal, IMRT, proton beam)
• —Chemotherapy (carboplatin, vincristine, temozolomide)
• —Targeted therapy (BRAF inhibitors for BRAF-mutated tumors)
• —ONC201 (for DIPG with H3K27M mutation)
• —Clinical trial enrollment strongly encouraged

Data

Statistics

Prevention

Risk Factors

• —Prior radiation to the head
• —Certain genetic syndromes (NF1, Li-Fraumeni, Turcot)
• —Most cases have no known cause

Further reading

Resources