Steve Hogan, the mayor of Aurora, announced on Facebook Monday that he has been diagnosed with cancer.
He also said that he will not be running for re-election in 2019.
The post says that Hogan got sick about a month ago and initially believed it was the flu. He says he will begin treatment for the cancer next week.
Hogan, a Republican, has served as the mayor of Aurora since November 2011. Before that, he served six terms on the Aurora City Council.
According to the Facebook post, Hogan will continue to work as mayor through his current term.