Prolapse, or rectal prolapse, refers to a condition in which the rectum of the anal canal prolapses outside the anus due to exenteration. Gastrointestinal dilatation with prolapse is seen in some patients with elastic pseudoxanthomatosis. The dilatation is caused by gas accumulation in the stomach and intestines due to abnormal digestive function. Elastic pseudoxanthomatosis is a systemic elastic fiber disorder, the cause of which is unknown to date. The following diseases are also causes of gastrointestinal dilatation and prolapse: 1. Gastroparesis syndrome Gastroparesis syndrome is a group of clinical symptoms characterized by delayed gastric emptying, mainly manifested as early satiety, postprandial epigastric distention, nausea, episodic dry vomiting, vomiting, weight loss, etc., also known as gastric paralysis, gastric weakness, etc. Gastroparesis syndrome occurs not only after gastric surgery, but also after other abdominal surgeries. It can be divided into two types, primary and secondary, according to the etiology. Primary, also known as idiopathic gastroparesis, mostly occurs in young women. Gastroparesis can be divided into acute and chronic according to the urgency of onset and duration of the disease. Gastric Dysrhythmia Syndrome Gastric Dysrhythmia syndrome refers to a group of syndromes of nausea, vomiting, abdominal pain and abdominal distension caused by disturbance or excessive gastric peristaltic rhythm. This syndrome occurs after abdominal surgery, such as cholecystectomy, esophageal hernia repair or pyloroplasty, and extensive autonomic nerve damage in severe diabetes. Other studies have suggested that a fine disorder of the ratio between excitatory neurotransmitters (such as acetylcholine, gastrin and gastrin) and inhibitory neurotransmitters (such as norepinephrine, dopamine, diastolic intestinal peptide, enkephalin, etc.) can lead to gastric rhythm disturbance. 3, gastrointestinal fistula Gastrointestinal fistula is one of the serious complications of gastrointestinal surgery. It is caused by trauma, surgical injury, severe abdominal infection, chronic intestinal inflammation and tumor. It is clinically divided into high and low fistula; high and low flow fistula; tubular and labial fistula, etc. Acute dilatation of the stomach (acute dilatation of stomach) is a high degree of dilatation of the stomach and upper duodenum due to retention of large amounts of gas, fluid or food in the stomach and duodenum. The clinical features of acute gastric dilatation and its treatment were described by Fagge in 1873, which began the intensive study of this disease. In acute gastric dilatation, the contents are retained in the stomach and duodenum and cannot be absorbed, so repeated vomiting often occurs, resulting in loss of water and electrolytes, acid-base imbalance, and blood volume reduction and peripheral circulatory failure. The gastric wall is thickened by hyperextension, thinning or inflammatory edema, or by necrosis and perforation of the gastric wall due to impaired blood flow, causing peritonitis and leading to shock. The transverse duodenum is compressed by the superior mesenteric artery and pressure ulcers may occur. Acute dilatation of the stomach is usually a serious complication after abdominal surgery or in certain chronic wasting diseases and in patients who are bedridden for a long time, and is mostly reported in China as a result of overeating.