How is a thyroglossal duct cyst diagnosed?
Generally, diagnosis is made by physical examination. The mass typically moves upward when the tongue is extended and with swallowing since the thyroglossal duct often connects at the base of the tongue. It is important to determine if the thyroglossal duct cyst contains thyroid tissues. In addition to a complete medical history and physical examination, diagnostic procedures for a thyroglossal duct cyst may include the following: • blood tests (to assess thyroid function) • ultrasound examination – to evaluate the muscle around the mass; a diagnostic imaging technique which uses high-frequency sound waves and a computer to create images of blood vessels, tissues, and organs. Ultrasounds are used to view internal organs as they function, and to assess blood flow through various vessels. • thyroid scans – a procedure that uses radioactive iodine or technetium (a radioactive metallic element) to reveal any physical abnormalities of the thyroid.
