I won't really discuss the breast CA issue as you have answered your own question. But, I will ask you what keeps you involved in toxic relationships? I realize there are two sides to every story...but if your interactions with your mother are the way you say...they are bordering on abusive. Do you live at home? If not, then what keeps you interacting with her? Why call? Why see her? Just because someone is blood doesn't give them the right to be abusive. Set healthy boundaries. If you are financially dependent upon your mother, find a way to make yourself financially independent and set healthy boundaries. You can set the rules of interaction and when she steps across the line, there is nothing saying you have to speak with her. Remove yourself from the situation. Surround yourself with people who love and support you. We teach people how to treat us.