NEW YORK - Good Morning America's Robin Roberts is facing a new medical challenge that will require her to start chemotherapy and get a bone marrow transplant.
The 51-year-old ABC anchor announced on the show Monday morning that she has been diagnosed with myelodysplastic syndrome, a blood and bone marrow disease once known as preleukemia.
She says she will undergo chemo and a bone marrow transplant this year as "pretreatment" for the disease, which she says she has known about for several weeks.
She says her sister is a great match for her. While she says she'll miss a day here and there, she'll remain on the air.
"My doctors tell me I'm going to beat this -- and I know it's true," Roberts wrote on her Facebook page.
Between 80 percent and 90 percent of MDS patients develop it when they're over age 60, according to the American Cancer Society.
Roberts said there's some "scary stuff" when you look up statistics about the disease, but ABC medical correspondent Dr. Richard Besser said these statistics don't shed much light on Roberts' case because she's "young and incredibly healthy" in comparison to most people who contract the disease.
Roberts battled breast cancer five years ago.