Robin Roberts has released a tell-all memoir, Everybody's Got Something. The 53-year-old Good Morning America host candidly discusses her childhood, career and struggle with cancer in the new book. She was diagnosed with breast cancer in 2007 and myelodysplastic syndrome (MDS), a disease of the bone marrow, in 2012. Roberts appeared on The Late Show Tuesday, and agreed with David Letterman that the title of her memoir is fitting. "You think that you're the only one," Roberts says of life's challenges. "But my momma would say, 'Honey, everybody's got something'... You face the challenge and the fight in front of you." MDS is a rare side effect of chemotherapy and radiation -- treatments that Roberts underwent in 2007 and 2008 to fight her cancer. The GMA host says, however, that she "wouldn't change a thing." "I want to make this abundantly clear," she asserts. "Chemotherapy and radiation saved my life." Roberts received a bone marrow transplant from her sister to treat the MDS, and tells Letterman the treatment seems to have been successful. "I am healthier and happier than I've ever been," she says. "That's all that matters." Everybody's Got Something hit bookshelves on Tuesday.