
Colorectal Cancer: Warning Signs, Screening, and Treatment
Colorectal cancer is a malignancy of the tissues of the large intestine and rectum. The most common type begins with abnormal growth in the lining cells, forming small growths called polyps. These polyps take time to develop into cancer, and removing them can prevent this process. Untreated cancer may spread through the intestinal wall or metastasize to the liver, lungs, peritoneum, brain, or bones.