Cancer can arise anywhere. Symptoms are dependent on where it comes from. I have see too many doctors succumb to cancer, with little warning. If mri's were f

Cancer can arise anywhere. Symptoms are dependent on where it comes from. I have see too many doctors succumb to cancer, with little warning. If mri's were faster, I think whole body mri's would be a decent screening tool. Problem is 1. They are expensive. 2. They take a long time to do and are uncomfortably loud 3. generate heat in the body. There are also tumor markers for many cancers. Screening guidelines unfortunately have to be doable to populations (lowest common denominator). More informed people with resources can do better if they take initiative (with some trade offs of time, risk). In general, our bodies can use a lot of tuning. The more you look, the more you find. Some tuning has trade offs. If you want to be proactive, you also have to ask your doctor for trials of particular tests or treatments. Doctors are conservative, and the first thing they will want to try is wait and see. That leaves you with may be 100 experiments you can do on yourself in a lifetime. We need to be able to do hundreds / week, to get significant progress towards making our bodies have 99.99999% up time. The future is Star Trek type doctor, but a personal one for everyone. The major hurdles are economic and regulatory. Some physical.