Final answer:
Colorectal polyps contain abnormal cells that can be removed during a colonoscopy, which helps in preventing them from turning malignant.
Step-by-step explanation:
Polyps in the context of colorectal cancer are abnormal cells or benign mucosal growths that can potentially turn into cancer if left unchecked. The process of screening and preventing colorectal cancer often includes the removal of these polyps, which is both possible and recommended. During a colonoscopy, a procedure that is considered the gold standard for diagnosing colorectal cancer, doctors can directly visualize the lining of the large intestine and remove any precancerous polyps found, thus preventing them from becoming malignant. It is notably a diagnostic as well as a therapeutic tool.