Christina Kashiwada was traveling for work during the summer of 2018 when she noticed a small, itchy lump in her left breast. She thought little of it at first. She did routine self-checks and kept up with medical appointments. But a relative urged her to get a mammogram. She took the advice and learned she had stage 3 breast cancer, a revelation that stunned her. “I’m 36 years old, right?” said Kashiwada, a civil engineer in Sacramento, California. “No one’s thinking about cancer.” About 11,000 Asian American and Pacific Islander women were diagnosed with breast cancer in 2021 and about 1,500…