Glioblastoma multiforme (GBM) is the most common glioma (a type of brain cancer). It represents nearly one fourth of all primary brain tumors. This cancer starts in the glial cells, which are cells that help nerve cells work.
This condition can develop spontaneously. Less commonly, it can develop from a lower grade, less malignant (cancerous) brain tumor. Most cases are located in the cerebral hemisphere, but the cancer can begin in the spinal cord or brain stem.
If you suspect you have this serious condition, contact your doctor immediately. Early treatment leads to a more favorable outcome.