There are many better sites that can do better and already offer more than I ever can, but I do want to offer my experience which is in my college essay. Eventhough it wasn't the malignant version, it still changed my life much. I also know that I am also at high risk, so not only do I do checks regularly, but also watch my diet.
Here are some links if you wish to know more:
A good place to start, for general information:
Health Center
