My husband has stage 4 colon cancer, he has been a survivor going on 8 years. He has worked full time through treatsments, the cancer is in his blood, he has had tumors on his liver, 2 cyber knife procedures and 1 oblation. After this last cyber knife procedure his CEA has not gone down as it did in the past, even with chemo treatments. HIs cat scan showed two spots on his lungs, about 3cm. My husband is a pessimist, he says he is a realist and these tiny spots are cancer spreading beyond the liver.