The human digestive tract has an upper mouth and an lower anus. This natural opening provides convenience for doctors to observe the pathological changes of the digestive tract. So we have gastroscope and colonoscope, which can observe the conditions of esophagus, stomach and colon. However, the adult digestive tract has 5 ~ 6 meters long, the general gastroscope can only see a part from esophagus to duodenum, colonoscope can only see large intestine. The longest small intestine in the middle, but there is no good way to observe it. Fortunately, the incidence of cancer in this small intestine, which is not easy to observe, is much smaller than that in the stomach and colon. However, in case something goes wrong Read More …