Robin Roberts gets a kiss on the cheek from sister Sally, who will be her bone marrow donor, as it is announced she will leave her hosting duties on “Good Morning America” a day early to undergo treatment for myelodysplastic syndrome. (Aug. 30, 2012)

*Robin Roberts gave her fans and well-wishers an update on her treatment this morning, describing her weakened physical condition during her current round of chemotherapy.

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“The start of last week went well but the daily chemo/treatment caught up to me by the weekend,” she wrote in a post for “Good Morning America.” “My body is so weak but not my mind. YOU give me the courage to keep going.”

Roberts said today will be her last day of chemotherapy before she receives her bone marrow transplant on Thursday, she revealed.

The “GMA” co-anchor has been in the hospital since last Monday preparing for the procedure. She was recently diagnosed with MDS, a rare blood and bone marrow condition, after her battle with breast cancer.

Roberts will receive a transplant from her sister Sally. Her treatment is expected to last several months, according to medical experts.