brain, spinal cord, and nerve disorders
Some Specific Brain Tumors
Diagnosis of gliomas
Doctors diagnose gliomas based primarily on results of magnetic resonance imaging (MRI) and biopsy. MRI provides better result if a contrast agent (gadolinium) is used to make structures easier to see. For the biopsy, doctors may take a sample of tumor tissue before or during surgery. If it is taken before surgery, a small hole is drilled in the skull and a needle is inserted to remove the sample. The sample is analyzed to determine the exact type of tumor. The sample is also tested for genetic mutations that affect the tumor's growth. This information may help guide treatment. 