Killian‐Jamieson diverticulum mimicking a thyroid nodule: A case report

Killian‐Jamieson diverticulum (KJD) is a rare disease of the cervical esophagus, often misidentified as thyroid nodules on ultrasonography. We performed carotid artery ultrasonography for an asymptomatic 68‐year‐old man. The ultrasound showed an oval nodule with heterogeneous echogenicity surrounded by a multilayered rim in the posterior left thyroid gland. As endoscopy and computed tomography confirmed pharyngoesophageal diverticulum in the anterolateral wall of the esophagus, we reached a final diagnosis of KJD. In cases where a thyroid nodule is detected by ultrasound, physicians should be aware of the possibility of KJD before performing invasive procedures.