Under normal physiological conditions, all surfaces of the cecum are covered by peritoneum, but 5% of people may not have peritoneal coverage on the posterior aspect of the superior segment of the cecum, and they have underdeveloped mesentery, so there is a certain degree of mobility, but the range of movement should not exceed 6cm. However, if the right colon mesentery and lateral peritoneum fail to fuse during embryonic development, it can lead to greatly enhanced mobility of the cecum and ascending colon. Even though they are still in the normal right lower anatomical position, they can twist and displace due to abnormal activity, sometimes even crossing the median to the left, leading to a series of symptoms of partial intestinal obstruction, known as active cecum syndrome (hyperkinetic cecum syndrome).