PMC5686463_01
Axial (A), coronal (B), and sagittal (C) enhanced computed tomography images of the neck at the bone window (left to right) demonstrating linear calcifications (white arrows) adjacent to the C1 arch and the odontoid process of C2. Note that there is no evidence of destruction of adjacent vertebral-body bony tissue or narrowing of intervertebral disc space suggestive of underlying diskitis.
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The CT findings demonstrated small amounts of linear calcification/ossification involving the left longus colli muscle, adjacent to the C1 arch as well as the base of the odontoid process of C2 (arrows in Fig. 1A-C).
Sagittal (A) and axial (B) enhanced computed tomography images of the neck at the soft-tissue window (left to right) demonstrating mild prevertebral thickening with edema (dotted white arrows), of up to 1.1-cm thickness. There is mild obliteration of the left parapharyngeal space with mild adjacent mass effect on the nasopharynx and on the left carotid sheath vessels laterally (smooth white arrow). There is no evidence of peripheral enhancement or venous thrombosis suggestive of underlying infection.
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Slightly inferior to this position and predominantly on the left side, there was mild prevertebral thickening and edema involving the retropharyngeal space (Fig. 2A), which tapered inferiorly at the C3-C4 level. The edematous changes described above extended to the right retropharyngeal space as well, with no central gas locules or surrounding peripheral enhancement suggestive of underlying phlegmon or abscess formation (arrows in Fig. 2B).