Dr. karthik Garapati shares his concerns about people delaying their colonoscopies during the pandemic. He is concerned that many preventable cancers will have been missed, and that colon cancers will be detected at later stages, making it harder to treat. Colon cancer is one of the leading causes of cancer deaths in the United States. It is also one of the most treatable cancers when detected early. It is also one of the only cancers that is preventable. Screening colonoscopies can detect and remove pre-cancerous polyps before they have time to develop into colon cancer.