The Associated Press

NBC's Tom Brokaw Vows to Work Despite Cancer Diagnosis

Tom Brokaw reveals cancer diagnosis but remains upbeat and on the job.

The Associated Press

Tom Brokaw announced Tuesday that he has been diagnosed with a blood cancer known as multiple myeloma.

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Renowned journalist and former NBC News Nightly anchor of 22 years Tom Brokaw has been diagnosed with cancer.

NBC made the announcement Tuesday, saying Brokaw was "diagnosed with multiple myeloma, a cancer affecting blood cells in the bone marrow, in August at the Mayo Clinic."

"His doctors are optimistic about the outcome of the treatment he is receiving, and Brokaw said he remains 'the luckiest guy I know,'" NBC reported.

[READ: Tom Brokaw Has Many Treatment Options for His Blood Cancer]

NBCUniversal said he has continued to work throughout his treatment and highlighted his most recent documentary on former President John F. Kennedy’s assassination.

Though myeloma is not curable, it is treatable, UCLA hematologist Gary Schiller told USA Today. He explained how a number of new treatments have largely extended the lives of those diagnosed with the chronic disease.

The survival rate after diagnosis is about five to seven years, Georgetown's Lombardi Cancer Center hematologist and oncologist Catherine Broome said to USA Today.

[ALSO: Tom Brokaw Battling Blood Cancer]

In a personal statement released by Brokaw, he asked the public to be respectful of his privacy saying, "I am very grateful for the interest in my condition but I also hope everyone understands I wish to keep this a private matter."

The American news icon remains positive about his disease and indicated he has no intention of letting it affect his work as a journalist.

“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,” Brokaw said.