Extremetech: Esophageal cancer is a terrible disease. Because of the very few symptoms presented early on in the disease, most patients aren’t diagnosed until the cancer is in an advanced state. If the cancer is detected and treated while it is isolated to the esophageal mucosa, patients have an estimated 80% five-year survival rate (5YSR). If it’s not caught until symptoms start showing, the 5YSR goes down to a tiny 15%. That’s why this tiny 3D camera the size of a pill — designed to help doctors find pre-cancerous tissue in the esophagus — will help save countless lives.