Intrathyroidal Branchial Cleft Cysts Presenting as Bilateral Thyroid Nodules

摘要

Introduction: Intrathyroidal brachial cleft cysts are a rare entity and are usually associated with Hashimoto’s thyroiditis. Etiology is not very clear at this point, but they are thought to arise from the ultimobranchial body remnant during embryogenesis of the gland versus originating secondary to chronic inflammation as a form of squamous metaplasia. They are a common finding in the lateral neck but not with the thyroid. We present a case of a suspicious appearing bilateral thyroid nodules which were found to branchial cleft cysts on biopsy.