The evaluation of an oligodendroglioma begins with a medical history and physical examination.

Physical findings in someone with oligodendroglioma include:

• Weakness on one side of the body:
• Arm weakness (unilateral)
• Leg weakness (unilateral)
• Arm and leg weakness (unilateral)
• Numbness on one side of the body:
• Arm numbness (unilateral)
• Leg numbness (unilateral)
• Arm and leg numbness (unilateral)
• Difficulty swallowing
• Difficulty walking
• Difficulty with balance
• Difficulty speaking
• Facial weakness:
• Facial drooping
• Loss of coordination
• Memory loss
• Confusion
• Vision changes:
• Double vision

Testing is necessary to make the diagnosis of oligodendroglioma.

Tests that may be used to evaluate oligodendroglioma include:

• Angiogram of the brain
• Brain biopsy
• CT scan of the brain
• MRI scan of the brain
• PET scan of the brain
• SPECT scan