Methods:Lugol s iodine was sprayed on the esophageal mucosa from 168 cases through endoscopy, and multiple biopsies were taken for pathology detection from unstained areas.

• 方法:168例患者经内镜下喷洒卢戈氏液对食管粘膜染色后观察,并取不染区组织进行病理检查。