What is Colorectal Cancer?
Colorectal cancer (CRC) develops from uncontrolled growth of cells in the colon or rectum, often beginning as benign polyps that progress to malignancy. It ranks as the third most common cancer globally and the second leading cause of cancer-related deaths in the United States. Key molecular drivers include mutations in KRAS, BRAF, APC, and microsatellite instability (MSI), which influence prognosis and treatment selection.