When we think of cancer, a lot of the time we think about the big C and we get freaked out about what we got and we're thinking about all the horrible things that are going to happen to us. And yet, we live with cancer all the time. We all have cancer in us at any single moment of time and some of those cancers are fairly sizable. Autopsies done on women aged 50 years and have died of other causes than cancer, when their breasts were sectioned 30% of them had invasive cancer. At age seventy about 70% of men have prostate cancer.