A Case of Contemporaneous Occurrence of Thyroglossal Duct Cyst and Lingual Thyroid without the Orthotopic Thyroid Gland / 대한이비인후과학회지

ABSTRACT

Thyroglossal duct cyst (TGDC) and lingual thyroid (LT) are two relatively common anomalies of thyroid gland development. Each may occur without the orthotopic thyroid gland, although the co-existence of these three anomalies is very rare. The thyroidal function may be abnormal in both anomalies, and careful evaluation of thyroid function is essential for the management of these lesions. A 71-year-old woman was admitted to our department for removal of midline neck mass. She underwent the classical Sistrunk's operation, but after the surgery, her hypothyroidism became aggravated. We report, along with a literature review, an extremely rare case of co-existence of TGDC and LT in the absence of orthotopic thyroid gland.