Pre-operative contrast-enhanced CT of the neck. (a) Axial and (b) coronal CT images through the supraglottis and thyroid cartilage show expansion of the thyroid cartilage (arrows) with internal hypoattenuation and peripheral rim enhancement, which is compatible with abscess formation between the perichondria. The anterior midline enhancing tissue (arrowhead) corresponds to the exophytic lesion evident on endoscopy at the petiole/anterior commissure.