DENVER—Trying to show empathy, Marilyn Rossum, 42, informed coworker and recently diagnosed breast-cancer patient Georgia Anderson, 40, that she participated in a breast-cancer walk-a-thon in 2001. "Oh, Georgia, I'm so sorry," Rossum told Anderson upon hearing the news Monday. "A few years back, I did the Avon Walk For Breast Cancer, and there were so many brave women like you who were afflicted or survivors, and it was just so moving." Rossum added that her efforts raised nearly $80 for breast-cancer research.