Ultrasonography of Zenker’s diverticulum: special reference to differential diagnosis from thyroid nodules

There have been only two case reports so far in literature on ultrasonographic features of Zenker’s diverticulum. We report a case of Zenker’s diverticulum and discuss the ultrasonographic images in comparison with those of thyroid nodules. Awareness of changeable internal echoes and not mistaking strong echogenic foci caused by air for calcification were most important for making the differential diagnosis of Zenker’s diverticulum from thyroid nodules.