Ключевые слова: 3d, anus, benign tumours, cancer, cancer symptoms, cells, chemotherapy, colon, colon cancer, colonoscopy, colorectal cancer, cure, digestion, digital, endoscopic, flexible, health, illustration, patient, polyp, precancerous, radiation therapy, rectum, rectum cancer, removal, scientific, sling, surgery, treatment, vaccine therapy, virtual colonoscopy,