Oligodendrogliomas can cause a wide variety of symptoms. Symptoms may be similar to those of a stroke, but do not begin abruptly. Slow-growing tumors may result in subtle symptoms that develop over a long period of time. For this reason, oligodendrogliomas can be quite large at the time of diagnosis.

The most common symptoms of oligodendroglioma include:

• Headache:
• Slowly worsening episodes
• Pain may be worse in the morning
• Pain may increase during coughing
• Symptoms that may accompany the headache:
• Nausea
• Vomiting

Additional symptoms of oligodendroglioma may include:

• Change in vision:
• Blurry vision
• Double vision
• Confusion
• Dizziness
• Difficulty speaking
• Difficulty walking
• Hearing loss
• Memory loss
• Numbness in one arm or leg:
• Arm numbness (unilateral)
• Leg numbness (unilateral)
• Arm and leg numbness (unilateral)
• Weakness in one arm or leg:
• Arm weakness (unilateral)
• Leg weakness (unilateral)
• Arm and leg weakness (unilateral)

Rare symptoms of oligodendroglioma may include:

• Focal seizures
• Grand mal seizures
• Personality changes
• Unusual behavior

Symptoms of oligodendroglioma in children and infants may include:

• Posturing:
• Abnormal body positions
• Abnormally increased head size
• Head circumference large for age
• Lethargy
• Excessive sleepiness