"Silent waters run deep" they say. "What you don't see might kill you" is another way to put it. "Be careful of blind curves". These sayings are reminders that we should be more vigilant and sensitive to the things, people, circumstances and feelings that befell us. It's not always wise to assume. Colorectal cancer is one disease that does not cause any symptom at its early stage. When they do occur, the most common symptoms are abdominal pain, occasional blood in stool or very dark stool, and a change in bowel habits, such as more frequent stools or a feeling that your bowels are not emptying completely. But since we often experience these symptoms, we usually dismiss them as something ordinary, relating it to the food we ate or the activity we did right after eating, etc. This is exactly what happened to an aunt of mine who kept dismissing an intermittent abdominal pain she was suffering from, only to find out a year later that she had colo...