Intra-thyroid esophageal duplication cyst: A case report

Figure 1 Ultrasound examination showing a hypoechoic nodule in the left thyroid gland. A: Nodule area; B: Nodule blood supply.

Figure 2 Thyroid computed tomography image showing multiple scattered free gases in the subcutaneous tissue on the right side of the lower neck and around the thyroid gland.

Figure 3 Esophageal contrast imaging showing no evident signs of fistula.

Figure 4 Intraoperative exploration showing a fistula with a diameter of about 0. 5 cm visible in the muscular layer of the anterior wall of the esophagus. a: Trachea; b: Esophageal seromuscular layer rupture; c: Recurrent laryngeal nerve.

Figure 5 Histopathological analysis of the resected specimen. A: The resected specimen: Cyst in the left thyroid gland; B-D: Haematoxylin and eosin staining, the cyst wall is ciliated columnar epithelial (× 100).