A Large Substernal Goiter that Extended to Both Sides of the Thorax

Figure 2

CT findings. CT of the neck and chest showed diffuse swelling of the thyroid gland and a substernal goiter, which extended to both sides of the thorax. The goiter extended to the bifurcation of the trachea on the dorsal side of the superior vena cava, the innominate vein, the aortic arch, and the ventral side of the trachea. It compressed the trachea in the mediastinum, and the lumen of the trachea measured 6 mm in diameter at its narrowest point (arrow). Pleural effusion was also seen in the right thorax.