Thyroid ultrasound: Esophageal carcinoma masquerading as a thyroid nodule

(A) Transverse view of the thyroid with the posteriorly located hypoechoic density. Dashed arrows demonstrate the white "flash" of saliva with swallowing. Solid arrows denote the anterior surface of the thyroid gland. (B) Sagittal view of the irregular mass (arrowheads) along the posterior margin of the thyroid. Dashed arrows demonstrate the white "flash" of saliva while swallowing. Solid arrows denote the anterior surface of the thyroid gland.