Good Morning America co-host Robin Roberts

"Good Morning America" co-host Robin Roberts, who five years ago defeat breast cancers, said Wednesday that she has now been clinically identified as having myelodysplastic symptoms, a system problem due to radiation strategy to her melanoma. She is now taking radiation therapy in planning for receiving a cuboid marrow implant from her sis later this season. Because she is relatively healthier and young, the combination of treatments should cure the situation, physicians have told her.

Myelodysplastic symptoms is sometimes known as pre-leukemia, and many scientists now believe that, if neglected, it will progress to serious myeloid the leukemia disease. It most commonly hits people between the ages of 58 and 75, but can occur at any age, particularly if the affected person has had melanoma radiation therapy. It is estimated to affect as many as 50 People in america per 100,000, with about 20,000 new cases each season.

It is a disease of the cuboid marrow -- the semi-liquid tissue inside bones that produces system tissues. Control tissues in the cuboid marrow become two kinds of tissues, myeloid and lymphoid. Lymphoid tissues go on to become bright system tissues that fight attacks. Myeloid tissues become three different kinds of cells: red system tissues, which carry oxygen; platelets, which control blood loss by developing clots; and bright system tissues. In myeloplastic symptoms the myeloid tissues stop developing; they do not function normally and either die in the cuboid marrow or soon after they enter the system. The structural tissues audience out healthier tissues.

Symptoms are often not apparent, but can include difficulty breathing, weak point or exhaustion, light skin, easy discoloration and blood loss, and high temperature or frequent attacks. The best strategy to the type of problem Roberts is suffering is to destroy all the stem tissues with radiation therapy, then replace them with performing stem tissues from a contributor -- in this case, her sis. Treatment solutions are usually more effective when the problem has been due to radiation therapy.

 Roberts declared her situation on the show and on the ABC blog, saying she will continue her job at "Good Morning America" and that "My physicians tell me I’m going to defeat this — and I know it’s true."