Since the beginning of this August, Ms. Li (48) from Wuhan, whenever she strains herself, a large lump would protrude from her neck. She suspected that there was something wrong with her thyroid gland and thus went to the General Hospital of Hubei Armed Police Corps for medical treatment. The neck-chest CT examination showed that there was no obvious abnormality in Ms. Li's thyroid gland, but the esophagus dilatation was extremely serious with the width of 6-7 cm, while the normal person's esophagus is only 1-2 cm wide.