Symptoms of hindbrain tumor vary according to the size of the tumor and the area affected. If the tumor in the back of the brain is due to the brainstem and cerebellum, the patient may experience dizziness, nausea, vomiting, unstable walking, tremor of the limbs, inability to hold objects or point to the nose, and swaying from side to side when walking. Patients may also have speech impairment, such as slurred or blurred speech, and choking and coughing when drinking or eating. In case of brainstem lesions, patients may also have eye movement disorders, diplopia and blurred vision. If the tumor reaches the fourth ventricle, hydrocephalus may occur, such as psychiatric symptoms, excessive irritability and convulsions. If the tumor is so large that it causes brain herniation, the patient will have unequal pupil size on one side, and in severe cases, coma and high fever.