NCCN Guidelines for Patients
Colon Cancer, Version 1.2014
Colon cancer basics
• The colon absorbs water from unused food.
• The wall of the colon has four layers.
• Colon cancer often starts in cells that line the
inside wall and make mucus.
• Cancer cells form a tumor since they don’t
grow and die as normal cells do.
• Cancer cells can spread to other body parts
through lymph or blood.