Bradley worked for CBS for 35 years and was a reporter on the CBS news magazine, "60 Minutes," for 26 of those years.
Details of Bradley's illness — including the type of leukemia he had and when he was diagnosed — were not immediately made public.
Leukemia is a cancer that begins in the blood cells. Its exact cause is not known.
There are four common types of the disease:
Common leukemia symptoms include:
Such symptoms aren't sure signs of leukemia. Only a doctor can diagnose the disease.
Leukemia symptoms may be acute, meaning they start suddenly and worsen quickly. Or they can be chronic, starting mildly and worsening gradually.
Treatment depends on the type and extent of the disease and can include chemotherapy, biological therapy, radiation therapy, and bone marrow transplantation.
Doctors often can't say why one person gets cancer and another doesn't. But several risk factors have been tied to leukemia, including:
Most people who get leukemia do not have any risk factors. Leukemia does not usually run in families. But in very rare cases, this can happen with chronic myeloid leukemia.
SOURCES: CBS News: "60 Minutes' Ed Bradley Dead at 65." WebMD Medical Reference from MedicineNet.com: "Leukemia." American Cancer Society Web site: "What are the key statistics about acute myeloid leukemia?", " What are the key statistics about acute lymphocytic leukemia?", " What are the key statistics about chronic myeloid leukemia?", "What are the key statistics about chronic lymphocytic leukemia?" WebMD Medical Reference from Healthwise: "Leukemia."
By Miranda Hitti
Reviewed by Louise Chang, M.D