(Fox News) Sen. Mark Kirk suffered a stroke and underwent surgery on Monday, after which doctors indicated his prognosis is good for recovery though he will need rehabilitation and likely the use of his left arm "will be very difficult."
The 52-year-old Kirk checked himself into Lake Forest Hospital in Illinois on Saturday. He was transferred on Sunday to Northwestern Memorial Hospital in Chicago, where tests showed that he had suffered an .
"Early this morning the senator underwent surgery to relieve swelling around his brain stemming from the stroke," a spokesperson from his office said. "The surgery was successful. Due to his young age, good health and the nature of the stroke, doctors are very confident in the senator's recovery over the weeks ahead."
Dr. Richard Fessler, a neurosurgeon who performed the surgery, told reporters that Kirk was having "dizziness and perhaps a headache," but he wasn't at the hospital where Kirk first checked in so doesn't know the exact symptoms Kirk presented when he first arrived for help.