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OTRC: Robin Roberts returns to 'Good Morning America' before bone marrow transplant

Robin Roberts appears on 'Good Morning America' on July 25, 2012 (left), Aug. 20, 2012 (center) and Aug. 21, 2012.

Robin Roberts has returned to ABC's "Good Morning America" after taking almost three weeks off and ahead of a scheduled medical leave, during which she will undergo a bone marrow transplant.

The 51-year-old co-host said on her Twitter page that her surgery, which is set to treat the blood disorder myelodysplastic syndrome, is still on schedule to be performed "later this month or very early September."

She had gone on an early vacation on August 1 after saying she felt unwell.

Roberts, wearing a hot pink sleeveless dress, said on Monday's show that she feels great, "rested and rarin' to go." Notably absent was a colorful armband like the kind she had sported in the weeks before her vacation. They had been used to cover her chemotherapy PICC line treatments.

"Many asking about my PICC line being removed...sweet freedom!" Roberts said on her Twitter page. "Taken out before vaca. Something else will be used for upcoming transplant."

Roberts revealed her ailment in June, saying it was caused in part by treatments she had undergone for breast cancer five years ago. Her sister, Sally-Ann, is her bone marrow donor.

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