"Good Morning America" co-host Robin Roberts is facing another major health battle.
51 year old Roberts says she has been diagnosed with myelodysplastic syndrome (MDS), a rare blood disorder affecting the bone marrow.
Experts say the bone marrow loses its ability to produce enough mature blood cells.
MDS is often referred to as pre-leukemia.
Doctors say, it might be linked to Roberts prior cancer treatment five years ago.
Roberts will receive a bone marrow transplant from her older sister later this year.
Roberts remains upbeat about her diagnosis and her prognosis.
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