Robin Roberts Announces Medical Leave From 'Good Morning America'

Robin Roberts, 51, the co-anchor of Good Morning America with George Stephanopoulos, 51, announced this morning on air that this will be her last week on GMA before she takes a medical leave of absence to undergo treatment for a bone marrow transplant due to suffering from a rare blood and bone-marrow disease, MDS or myelodysplastic syndrome.

Roberts, who also took a brief leave from GMA to undergo surgery for breast cancer in 2007, revealed earlier this summer that she had been diagnosed with MDS and was anticipating having the transplant at some point in August.

Roberts will check in to the hospital on Tuesday. "It still takes about 10 days after being admitted because there are some things you have to go through before the transplant actually occurs," Roberts said. Her sister, Sally, will be her donor.

GMA also officially tweeted about Roberts' leave: "Friday will be @RobinRoberts' last day before leaving for her bone marrow transplant and treatment for MDS."

This week Good Morning America will celebrate the theme of "Robin's Journey," covering her struggle with breast cancer and MDS.

For more like this:

Barack Obama Voices Support For Gay Marriage, Celebs React

NBC In Talks To Replace Ann Curry On 'Today' After One Year

VIDEO: Drew Barrymore Talks Wedding Plans

BREAKING: Chris Brown Freaks Out On 'GMA'

Chris Brown Apologizes For 'GMA' Meltdown, Says He Was Exploited

VIDEO: Britney Spears Performs On 'GMA,' Announces Tour With Enrique Iglesias

Whitney Rocks Central Park