Washington (CNN) - Oregon Democratic Sen. Ron Wyden returned to the Senate to vote on the START treaty just two days after surgery for prostate cancer.
Wyden had surgery for early stage prostate cancer on Monday at Johns Hopkins University Hospital in Baltimore, Maryland.
A spokeswoman for Wyden says the Senator returned to the Senate because it's an "important vote."
According to his spokeswoman, Wyden's doctor said the surgery couldn't have gone any better, and that it is even good for him to get some short walks in while he's recovering.
His staff was trying to encourage him to stay home and rest this afternoon, but after speaking with Senators Reid and Kerry, Wyden decided that this vote was important enough to make one of those short walks.
Wyden announced the surgery in a statement last week, and said he had scheduled the procedure anticipating the Senate would be in recess when it was performed.
"After my annual physical in late November, I was diagnosed with early stage prostate cancer," Wyden said in the statement. "After reviewing all the options with multiple physicians, I decided to take a proactive approach and have surgery, which will be performed December 20 at Johns Hopkins Hospital by Dr. Alan Partin."
"I scheduled the surgery for the Monday before Christmas anticipating that the Senate would have recessed by that time and that there would be no disruption to my work in Oregon or Washington."