NBC announced yesterday that long-time anchor Tom Brokaw, 74, is being treated for bone marrow cancer, and that doctors are pleased with the progress he is making. 

The network said the famed anchor was diagnosed with multiple myeloma, a plasma cell cancer over the summer at the Mayo Clinic. Brokaw said he is doing well in a personal statement: 

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.

NBC says he has continued to work on news projects throughout his treatment, including a two-hour documentary on JFK's assassination. He has also appeared on NBC news shows and contributed to Sochi coverage. 

Brokaw began working at NBC as a reporter in 1966. He hosted The Today Show from 1976-1981 before became the anchor of NBC Nightly News in 1982, where he remained for 22 years. He authored a bestselling book on "The Greatest Generation," witnessed the fall of the Berlin Wall, and nabbed a first American interview with Mikhail Gorbachev, in addition to covering other major news events for the network. In 2004, he relinquished the position to Brian Williams, and has contributed to NBC as a special correspondent since. 

Fellow journalists wished the veteran reporter well on Twitter: 

We hope his treatment continues to go well.