Seizures Seizures are another common symptom of brain tumors. Seizures are caused by a disruption in the normal flow of electricity in the brain. Those sudden bursts of electricity can cause a variety of symptoms including convulsions, unusual sensations, and loss of consciousness. Focal seizures can also occur. Symptoms of a focal seizure depend upon the tumor's location and can include muscle twitching or jerking, abnormal smells or tastes, problems with speech or numbness and tingling.
Seizures are the presenting symptom in approximately one-third of patients.
About half of all patients experience some form of seizure during their illness. Mental changes Mental changes frequently occur. Changes in behavior, temperament and personality are other indications of mental change. Mental changes are caused directly by the tumor, by increased pressure within the skull or by involvement of the areas of the brain that control personality. These all result in mass effect.