PMC3837488_01
A contrast-enhanced axial CT image shows an enhancing, lobulated mass in the left preauricular region.
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figure1
A computed tomography (CT) scan of her head performed four years previously demonstrated an ill-defined lesion in the superficial left parotid gland that corresponded to a palpable preauricular mass (Figure 1).
Axial T1-weighted image (A) and post-contrast coronal T1-weighted images with fat saturation (B, C) demonstrates a curvilinear band of enhancing tumour (arrows in A, B) that extends from the left parotid mass (asterisk) and tracks behind the mandibular ramus and joins with the V3 nerve in the masticator space. There is contiguous extension along V3 superiorly through a widened foramen ovale (dashed arrow in C) and asymmetric thickening and enhancement of the left cavernous sinus.
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figure2
A magnetic resonance imaging (MRI) examination was performed (Figure 2).