Since my first breast cancer in 2003,I've researched,read and talked to hundreds of women. The only common denominator was high levels of stress approximately 18 mths before the bc diagnosis. I'm not saying that stress causes cancer but maybe it helps it along? Breast cancer is really a lot of breast diseases so I guess that makes it hard to find a single cause They now know about the genetic ones. Obviously some us have a genetic disposition to get a cancer of some sort. There's no bc in my family but there is a lot of other cancers. Just like some families seem to have heart issues.I have a healthy lifestyle,not fat,don't smoke or drink and yet I got it again in 2010. I've only met about 2 obese women with bc in the past 14years so I doubt that risk factor.Author Patrea King says 'peace of mind' is the most important thing,followed by a healthy diet and lifestyle.Being proactive about our health makes us feel like we have some sort of control again after being out of control with cancer and its treatments.It's no guarantee but it's all we've got till they crack the code so to speak.Somehow a cell makes a mistake and somehow our immune system misses it. So I'm going with the 'stress' theory for now and practise mindfulness and whatever else relaxes me.xx