很難回答。前幾天一網友帖子裏的主人公已經過世，她癌症初發和複發mammogram都沒有檢查出，自己摸出來的。

上海灘的原唱歌手也是自己摸出來的，mammogram沒檢查出。

http://bbs.wenxuecity.com/health/532976.html

“I'm proof that early detection doesn't cure cancer. I had more than 20 mammograms, and none of them caught my disease. In fact, we now have significant studies showing that routine mammogram screening, which may result in misdiagnoses, unnecessary treatment and radiation overexposure, can harm more people than it helps.”

現在有種新的檢查，保險不cover, 沒有輻射，叫Breast Thermography。