By Daniel Kreps Actress Amanda Peet revealed that she was diagnosed with breast cancer in a new essay she wrote about the death of her parents. In “My Season of Ativan,” published in The New Yorker on Saturday, Peet says she received her diagnosis before Labor Day last year, amid a time when both of her parents were in hospice care on opposite coasts. “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. “I had been seeing a breast surgeon every six months for checkups. The Friday before Labor Day, I went for what I thought would be a routine scan. Dr. K. usually chatted me up while she examined me, but this time she went silent. She told me that she didn’t like the way something looked on the ultrasound and wanted to perform a biopsy. After the procedure, she said that she would walk the sample over to Cedars-Sinai and hand-deliver it to Pathology.…