Sen. Johnny Isakson revealed Tuesday he is suffering from Parkinson's disease.

The Georgia Republican, who has been in office since 2005, told reporters in his Capitol Hill office that his prognosis is good and that he plans to run for re-election in 2016.

"I am in the early stages of the disease, and my main symptoms are the stiffness in my left arm and a slowed, shuffling gait," said Isakson, 70. The news was first reported by NBC.

A statement from his neurologist released by Isakson's office said the senator is "fully capable" of doing his job.

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