NBC correspondent Tom Brokaw says he has been diagnosed with cancer but is encouraged with his progress against the disease. (NBCnews.com)

Brokaw said he has multiple myeloma, a cancer that affects blood cells in the bone marrow. He was diagnosed at the Mayo Clinic in August.

While under treatment, Brokaw has continued to work as a correspondent for NBC on several special projects. He has worked for the network since 1966.

Brokaw released the following statement with the news of his cancer:

"With the exceptional support of my family, medical team and friends, I am very optimistic about the future and look forward to continuing my life, my work and adventures still to come.

"I remain the luckiest guy I know.

"I am very grateful for the interest in my condition but I also hope everyone understands I wish to keep this a private matter."

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Former Fulton County election worker Ruby Freeman talks to her daughter, Wandrea ArShaye "Shaye" Moss, a former Georgia election worker, after she testified before the U.S. House Select Committee at its fourth hearing on its Jan. 6 investigation on Capitol Hill in Washington, D.C., on Tuesday, June 21, 2022. (Yuri Gripas/Abaca Press/TNS)

Credit: TNS