[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/09/07/art.kennedywave0907.gi.jpg caption="Despite his illness, Sen. Kennedy recently traveled to Denver and addressed the Democratic National Convention."]
(CNN) - Massachusetts Sen. Ted Kennedy, who underwent surgery in June for a brain tumor, will not return to Capitol Hill this week when Congress returns from its August recess.
The senator, who was diagnosed with brain cancer in the spring, plans to return to the Senate in January, said spokesman Anthony Coley.
"As Sen. Kennedy said two weeks ago in Denver, he intends to be on the floor of the United States Senate next January when we begin to write the next great chapter of American progress," Coley said. "Senator Kennedy's doctors are pleased with his progress so far and have recommended that he continue to work from home through the fall."
Congress is only returning for a short session. The Senate will spend three weeks in session before breaking for the campaign season.
Kennedy, 76, made his first appearance in the Senate in July, returning to cast a vote to help break a deadlock on an important Medicare bill. He is currently undergoing radiation treatment and chemotherapy.