Ultrasonographic features of pharyngoesophageal diverticulum in a case misdiagnosed as a thyroid nodule: a case report and review of the literature

Ultrasonography technique is generally used for head and neck lumps. As pharyngoesophageal diverticula reach large sizes, it might project toward the thyroid gland which can be confused with thyroid nodule during thyroid ultrasonography, leading to unnecessary fine needle aspiration biopsy. In this report, we present a case of pharyngoesophageal diverticulum that mimicked thyroid nodule in ultrasonography together with literature knowledge and ultrasonographic signs.