Loss of normal cervical lordosis. Increased width of prevertebral soft tissue at upper cervical spine, worst at the upper cervical spine, which is more than the anteroposterior AP diameter of the cervical vertebral body. No emphysema or air pocket seen within this soft tissue thickening.
The oropharynx, hypopharynx, larynx and upper trachea are displaced anteriorly by the soft tissue thickening.
Epiglottis is mildly swollen with thickening of the aryepiglottic folds.