Legendary broadcaster Tom Brokaw has been diagnosed with cancer, NBC announced Tuesday.

Brokaw, who has worked at NBC News since 1966, said he and his physicians are “very encouraged” with the progress he is making. NBC reports he was diagnosed with multiple myeloma — a cancer affecting blood cells in bone marrow — after a visit to the Mayo Clinic in August.

NBC’s report includes this statement from Brokaw:

“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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