I'm a colorectal surgeon, and I want to say something that might sound strange: I hope you never need me. Not for this. Colorectal cancer is now the leading cause of cancer death in Americans under 50 — seven years earlier than researchers projected. One in five diagnoses today involves someone under 55. As a surgeon who has operated on patients in their thirties with metastatic disease, I have one ask this March: stop putting it off.