What kind of cancer was it?
I'm very sorry for your loss. It's a horrifying situation to be in when your loved one is diagnosed with cancer. Doctors are usually pretty realistic about the risks associated with cancer and even in the best of circumstances they know there is a very real chance of loosing their patient. However, even if it's only a 10% chance of survival, that's still that reason to hope and they try to treat it. It sounds like your daughter was young and sometimes the young fair better. So they did have cause to hope and treated her with what I assume was an aggressive treatment. Sometimes all the doctors do is try to give someone more time. My grandma's doctor was shocked and amazed she was still kicking a year after being diagnosed with stage 3 colon cancer. She may be in her final days now, but she was given an extra 4 years because of treatment.
As far as your other daughters go all they can really do is keep on their examinations. They can be tested for a specific gene to see if they have a higher risk of breast cancer, but I personally don't think that does much good. You can still get breast cancer if you don't have it and you can not get it even if you do. I would suggest they strictly follow their monthly self examinations (as do you) and maybe talk to their doctor about getting a mammogram earlier than 40. Younger women usually have less clear mammograms, but the faster something is found the better the chances are so maybe they can get one as young as mid 30's. I would also suggest for them to be well versed about ovarian and cervical cancer as there have been some suggested links between them and breast cancer.
There is no real way to prevent breast cancer but you can limit your chances. Don't smoke, keep in a healthy weight range, eat your fruits and vegetables, get your check ups. Also if any of them are on birth control maybe they should see their doctor to make sure they are on the best form of birth control for them. (One of my college friends said she wasn't allowed by her Dr. to use a type of hormonal birth control because she had one of the breast cancer genes. However that could have been bad information, so no point freaking out about Birth control until they speak to a dr. about it.) Read More At : ...