A Case of Ectopic Adenomatous Goiter in the Lateral Cervical Region

Abstract

A 41-year-old woman noticed a tumor on the left side of her neck. Cervical ultrasonography showed a cystic mass in the left lateral neck region. The mass was further enlarged at follow-up, and hence, the patient was referred to our hospital. A cystic tumor with an internal anechoic area and clear boundary was seen outside the thyroid gland. No abnormal cells were observed on aspiration cytology. The patient underwent tumorectomy. The tumor was present on the outside of the left internal jugular vein. It could be exfoliated easily. Pathologically, a follicular gland with poor dysplasia in the mural nodule and cyst wall was observed, so a pathological diagnosis of ectopic adenomatous goiter was made. Lateral cervical cystic tumors should be treated by surgical resection because of the possibility of malignancy as well as recurrence after aspiration.