Colon cancer is a type of cancer that starts in the large intestine, which is a part of the digestive system. It is a common type of cancer, and is the third leading cause of cancer-related deaths in the United States. It is important to be aware of the signs and symptoms of colon cancer, as early detection is key to successful treatment. Symptoms can include changes in bowel habits, bloody stools, abdominal pain, weight loss, and fatigue. Risk factors for developing colon cancer include age, diet, family history, and lifestyle. People over the age of 50 are at a higher risk for developing colon cancer, as are those who follow a diet high in red or processed meats, and those with a family history of the disease. Smoking, obesity, and a sedentary lifestyle can also increase the risk of colon cancer. Screening for colon cancer is important, and can help detect the disease before symptoms appear. Screening tests include colonoscopies, stool tests, and sigmoidoscopies. If a polyp is found during any of these screenings, it can be removed before it has the chance to turn into cancer.