Yes, cancer is so very silent. I am living proof of that, because I look perfectly normal; yet I live with an incurable form of leukemia. Found out by accident during routine bloodwork. I just get tired easier than I used to. I know of 3 dear people who found out they had cancer and died in a matter of weeks after the diagnosis...the most recent being a 2nd. cousin who found out he had cancer on Monday and died on Thursday at the hospital where he had arrived for his first chemo treatment.