An Adolescent with Transient Hyperthyroxinemia after Blunt Trauma to Head and Neck

Figure 1

Contrast-enhanced CT image of head and neck, demonstrating thyroid enlargement and asymmetry. After the administration of contrast, the right lobe contained more hypodense areas without enhancement compared to the left lobe, as indicated by the arrows. There was no extravasation of the contrast medium. These findings are suspicious of contusion or laceration, though the possibility of autoimmune thyroiditis could not be excluded.