US Senator Edward Kennedy, who is undergoing treatment for brain cancer, received hospital treatment Friday after suffering a mild seizure but returned home late in the day.

"Senator Kennedy experienced a mild seizure at home in Hyannis Port today and was taken to Cape Cod Hospital for examination," said his office in a statement.
He was taken by ambulance from the Kennedy family compound in Hyannis Port, Massachusetts, to nearby Cape Cod Hospital in south- eastern Massachusetts, south of Boston.
In May, the senator was diagnosed with malignant glioma after running several tests at the Massachusetts General Hospital.

"Doctors believe the incident was triggered by a change in medication. Senator Kennedy will return home tonight and looks forward to watching the debate," it was added in the statement. The senator’s office was reffering to the referring to the presidential candidates' debate between Republican John McCain and Democrat Barack Obama on Friday night.

The Senator underwent brain surgery in early June, in order to reduce the brain tumor’s size so he could start chemotherapy and radiation treatment.

Edward “Ted” Kennedy has been in the Senate for 45 years and unsuccessfully sought the centre-left Democratic nomination in 1980. He came to the Senate in November 1962. Senator Ted Kennedy is currently chairman of the Senate Committee on Health, Education, Labor and Pensions.

Last month, he made a dramatic appearance at the Democratic National Convention in Denver in support of Democratic presidential candidate Barack Obama.

Seizures are a common side effect of brain-tumour treatment and doctors told Kennedy that seizures will become more common as he battles his brain tumor, and that they were adjusting his anti-seizure medication.