The story

Sen. Edward Kennedy has the most common type of brain tumor, but the size and nature of the tumor will determine how life threatening it is, CNN's chief medical correspondent Dr. Sanjay Gupta said Tuesday.

Kennedy, 76, was hospitalized over the weekend after having a seizure.

Kennedy's doctors at the Massachusetts General Hospital said Tuesday that the preliminary results from the brain biopsy showed a tumor in the left parietal lobe was responsible for the seizure. Read full article »

-- CNN's John King contributed to this report.

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