Brain Tumors down arrow

Home > Disclaimer > Brain Stem Glioma


Brain Stem Glioma




Location and Patterns of Spread

The brain stem is generally described as involving three neural structures:

The pons encompasses both the cerebellar peduncles and the floor of the 4th ventricle.

The pons is the most common site of brain stem gliomas (80% of all brain stem gliomas arise in the pons).

10-15% of tumors arise in the medulla, and even fewer arise from the midbrain (5-10%). 


Tumor Location & Frequency:

Tumour Location Frequency
Pons 80%
Medulla 10 - 15%
Mid Brain 5 - 10%



  • There is no widely accepted staging system for brain stem gliomas. 
  • It is very uncommon for these tumors to spread outside of the brain stem at the time of initial diagnosis.  Diffusely infiltrative brain stem gliomas can occasionally be associated with neuraxis dissemination.



Back to top