Esophageal and gastric mucosal ectasia may not necessarily be precancerous lesions, but may also be related to inflammation, peptic ulcer and other factors. 1. Pre-cancerous lesions: cancerous lesions in esophageal and gastric mucosa can lead to esophageal and gastric mucosal ectasia. If not intervened in time, it can gradually develop into esophageal cancer or gastric cancer. 2. Inflammation: ectopic lesions in esophagus and gastric mucosa may be related to esophagitis, gastritis and other diseases. Patients may be accompanied by foreign body sensation in throat, pain and other symptoms such as abdominal pain, dyspepsia and diarrhea. 3. Peptic ulcer: such as esophageal ulcer, gastric ulcer and other diseases, can also lead to esophageal and gastric mucosa ectopic lesions, patients may be accompanied by heartburn, acid reflux, pain, hiccups and other symptoms. 4. Other factors: such as esophagus, stomach polyps, benign tumors, etc., can also lead to this phenomenon. The causes of this phenomenon are more complex. It is recommended that patients consult a doctor in time to confirm the cause of the disease, and then carry out treatment as soon as possible.