
BOSTON, Massachusetts (CNN) – The hospital treating Sen. Edward Kennedy said Tuesday that the Democratic senator has a malignant brain tumor.
The tumor was the cause of his seizure on Saturday, according to a statement from the doctors treating the 76-year-old at Massachusetts General Hospital.
While such tumors are usually treated by a combination of radiation and chemotherapy, Kennedy's doctors said "decisions regarding the best course of treatment for Senator Kennedy will be determined after further testing and analysis."
"Senator Kennedy will remain at Massachusetts General Hospital for the next couple of days according to routine protocol."
Kennedy "remains in good overall condition and is up and walking around the hospital," the statement said.
He was airlifted to Massachusetts General Hospital on Saturday, and has remained hospitalized since then.
(updated with additional information 1:30 p.m.; full hospital statement after the jump)
Drs. Lee Schwamm and Larry Ronan of Massachusetts General Hospital, where Kennedy is being treated, released this statement Tuesday:
"Over the course of the last several days, we've done a series of tests on Senator Kennedy to determine the cause of his seizure. He has had no further seizures, remains in good overall condition, and is up and walking around the hospital. Some of the tests we had performed were inconclusive, particularly in light of the fact that the Senator had severe narrowing of the left carotid artery and underwent surgery just 6 months ago.
"However, preliminary results from a biopsy of the brain identified the cause of the seizure as a malignant glioma in the left parietal-lobe. The usual course of treatment includes combinations of various forms of radiation and chemotherapy. Decisions regarding the best course of treatment for Senator Kennedy will be determined after further testing and analysis. Senator Kennedy will remain at Massachusetts General Hospital for the next couple of days according to routine protocol. He remains in good spirits and full of energy."


PARTISAN POLITICS ASIDE. WE ARE ALL MEMBERS OF GOD'S GREAT FAMILY. SPEEDY RECOVERY AND MY PRAYERS, FOR YOU AND YOUR FAMILY SEN. KENNEDY.
GOD BE WITH YOU MR.SENATOR .
God bless the Kennedys. Ted is a titan in American politics and it will be sad if he is unable to continue his hard work. I pray for his healing.
Wow!! Some of you people are such hypocrits, you practically whished the man dead when he endorsed Obama. Hypocrisy is such and evil thing. Judge Not, Lest Ye be Judged. You and you alone will have to answer for "all" your sins. Never wish harm to anyone because it will come back on you as sure as you live.
Sad, Just sad.. You call yourselves Americans.
Let your faith in the All Mighty guide you to a complete cure. Nothing in this world is impossible. Think of it as a heck of a challenge that you certainly did not need, but you will overcome it!
Soldier on Ted Kennedy, we all love you.
Wow!! Some of you people are such hypocrits, you practically whished the man dead when he endorsed Obama and "you know who you are". Hypocrisy is such and evil thing. Judge Not, Lest Ye be Judged. You and you alone will have to answer for "all" your sins. Never wish harm to anyone because it will come back on you as sure as you live.
Sad, Just sad.. You call yourselves Americans
GOD BLESS HIM AND HIS FAMILY
We can honor Senator Kennedy by supporting Hillary who won his state in the Democratic Primary In fact she won states with over 300 electorial votes while Obombus won just a little over 200. Hillary 2008
Big liberal lost for Obama, I think he done. Hope he will be ok soon but he's not the same as before because his age.
We love you Ted...keep on fighting...We 're praying for you....
Bless you Senator Kennedy and God Speed your recovery Sir
May God send his Angels to give you strength and perseverance
A Respectful concerned Canadian
Ontario Canada
God be with him, protect him and his familly throughout this difficult time.
How come all the pictures of Kennedy has Obama in them? Kennedy has a famly plus friends who have been with him for decades.
God will heal you. Be strong sir.
Please refrain from using this message board as a political forum. There is a man, a husband, a father, that is seriously ill. Either offer a prayer for him and his family, or stay silent. I've lost a parent to cancer, and I take personal offense at some of the comments I've seen here. I will be praying for Sen. Kennedy and his family, and also for those of you who are so small-minded and insensitive, that you can't help but get a dig in at a time like this.
WOW!! SORRY TO HEAR THIS but my prayers are with you and your family. May the Lord be with you.
TO SEN KENNEDY AND FAMILY
GET WELL SOON AND MAY GOD BLESS YOU...
-HILLARY 08