很难回答。前几天一网友帖子里的主人公已经过世，她癌症初发和复发mammogram都没有检查出，自己摸出来的。

上海滩的原唱歌手也是自己摸出来的，mammogram没检查出。

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.”

现在有种新的检查，保险不cover, 没有辐射，叫Breast Thermography。