Michelle Obama to ABC reporter: You are 'in our prayers'

First lady Michelle Obama on Monday personally tweeted ABC News's Robin Roberts following a public announcement about the reporter's health.

"Barack and I have you in our prayers," she tweeted.

.@RobinRoberts, Barack and I have you in our prayers. We believe in you and thank you for bringing awareness and hope to others. –mo

— Michelle Obama (@MichelleObama) June 11, 2012

Roberts announced her tweet was regarding "something I have been dealing [with] for the last couple months" on ABC's "Good Morning America" Monday morning.

"Today, I want to let you know that I've been diagnosed with MDS or myelodysplastic syndrome. It's a disease of the blood and bone marrow and was once known as preleukemia," Roberts wrote on ABC's blog. "My doctors tell me I'm going to beat this — and I know it's true."

Obama's Twitter feed directed followers to Roberts's post in order to understand the diagnosis. Roberts is also encouraging readers to sign up to be bone marrow donors.

Roberts has interviewed the first lady in the past, as recently as late last month, when Obama was promoting her book, American Grown.

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