Sen. Tom Coburn diagnosed with prostate cancer

July 18, 2011: U.S.Senator Tom Coburn (R-OK) speaks about his deficit-reduction plan during a media availability in the Capitol in Washington. (Reuters)

Oklahoma Republican Sen. Tom Coburn has been diagnosed with a recurrence of prostate cancer and is seeking treatment.

A spokesman says Coburn, a survivor of a 2011 bout with the disease, is "undergoing further evaluation and treatment."

Coburn has battled colon cancer and melanoma in the past.

He is expected to return to work in the Capitol as soon as next week.