Goiter, Substernal

**Definition:** An enlarged THYROID GLAND with at least 50% of the gland situated behind the STERNUM. It is an unusual presentation of an intrathoracic goiter. Substernal goiters frequently cause compression on the TRACHEA leading to deviation, narrowing, and respiratory symptoms.

**Tree numbers:** - C19.874.283.601

**Synonyms:** - Substernal Goiter