Charles Krauthammer, the popular Fox News commentator, revealed in a letter released Friday that he has just weeks to live amid a battle with cancer.

“I have been uncharacteristically silent these past ten months,” the letter began. “I had thought that silence would soon be coming to an end, but I’m afraid I must tell you now that fate has decided on a different course for me.”

“However, recent tests have revealed that the cancer has returned,” Krauthammer wrote. “There was no sign of it as recently as a month ago, which means it is aggressive and spreading rapidly. My doctors tell me their best estimate is that I have only a few weeks left to live. This is the final verdict. My fight is over.”

Krauthammer has been absent from “Special Report” since the fall, but previous indications were that he planned to return this spring.

“I leave this life with no regrets,” Krauthammer continued. “It was a wonderful life – full and complete with the great loves and great endeavors that make it worth living. I am sad to leave, but I leave with the knowledge that I lived the life that I intended.”

The 68-year-old has been a longtime fan favorite at the network, known for his robust political commentary and irreverent humor.