Fig 3.

Case 3.

A, Axial contrast-enhanced CT scan obtained through the oropharynx shows asymmetry of the parapharyngeal space, which was believed to be a result of surgery. Note the low-attenuating area on the right half of the tongue that represents denervated muscle atrophy and increased fat after resection of the right hypoglossal nerve.

B, Axial T2-weighted MR image (3500/110) obtained 3 months later shows that an abnormal mass (white arrows) with intermediate signal intensity replaces most of the retropharyngeal and parapharyngeal spaces, with involvement of the right ICA (black arrow).