“Dr. Coburn has had a recurrence of prostate cancer and will be undergoing further evaluation and treatment,” Coburn communications director John Hart said in a statement.
Coburn, a practicing physician who was first elected to the Senate in 2004, was treated for prostate cancer in 2011. Previously, the Oklahoma Republican was treated for two other types of cancer: a malignant melanoma in 1975 and colon cancer in 2003.
Hart said he expects the senator to return to work as early as next week.