Coincidentally, it was on the day Roberts and her "Good Morning America" colleagues were filming a farewell episode to Joel Siegel -- the program's film critic, who died of colon cancer – when she noticed a lump in her breast. She had the lump removed and returned to the news desk less than a month later. Roberts completed her cancer treatment in 2008. However, in early 2012, she was diagnosed with myelodysplastic syndrome, a disease of the blood and bone marrow. She took leave from her "GMA" desk in August to receive a bone marrow transplant, the same week that her mother passed away. But after approximately six months off, Roberts returned to the anchor's chair in late February in a comeback celebrated by friends, colleagues and millions of viewers across the globe.