Sonographic demonstration of a pharyngoesophageal diverticulum.

We report a case of pharyngoesophageal (Zenker's) diverticulum in a 91-year-old woman. Sonography of the thyroid gland showed diffuse enlargement of the gland and a well-defined, heterogeneous hyperechoic mass that appeared to be in the posterior left lobe. The mass had a smooth hypoechoic wall with a layered appearance anteriorly. Real-time sonography performed during the patient's ingestion of water showed transient changes in the size, margins, and echogenicity of the lesion, which subsequently reverted to its original appearance. Copyright 2000 John Wiley & Sons, Inc.