Brokaw was diagnosed in August with what's called multiple myeloma, a cancer affecting blood cells in the bone marrow.
Doctors say they're optimistic about his treatment.
In a statement Brokaw says he wants to keep his illness a private matter and plans to continue working.
According the American Cancer Society, multiple myeloma is a cancer formed by malignant plasma cells.
Normal plasma cells are found in the bone marrow and are an important part of the immune system.
It is the second most common blood cancer, after non-hodgkin's lymphoma.
The American Cancer Society estimates that more than 24,000 new cases will be diagnosed in this year.
It's more common among men than women and occurs more frequently as people get older.
UAMS in Little Rock has a world class myeloma institute for research and therapy.
In fact, people from all over the world come here for treatment.
To learn more about multiple myoloma visit the American Cancer website Cancer.org
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