Amanda Peet has been diagnosed with breast cancer. "For many years, I've been told that I have 'dense' and 'busy' breasts - not as a compliment but as a warning that they require extra monitoring," Peet wrote in a New Yorker essay published Saturday, March 21, revealing she was diagnosed "last fall." "I had been seeing a breast surgeon every six months for checkups," she continued. "The Friday before Labor Day, I went for what I thought would be a routine scan.