[Sonographic differential diagnosis of thyroid nodule. Pharyngoesophageal diverticulum].

Esophagography is the standard diagnostic method for diverticulum of the pharyngoesophageal junction. Less known is detection of the diverticulum during thyroid gland ultrasonography. Thyroid nodules located near the left trachea with a hyperechogenic border, beneath which a hypoechogenic zone and an echogenic center are seen, are highly suspicious for diverticulum of the hypopharynx/esophagus and should be investigated further. Postoperative follow-up is facilitated by the rapid sonographic involution of the preoperatively described nodule.