PMC4367047_01
Axial unenhanced computed tomography (CT) scan of the temporal bone - bone-window - (a) and coronal reformatted CT image of the skull base (b) in the same patient, showing cystic density lesion causing enlargement of the right jugular foramen (arrows)
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F1
No intralesional calcifications or erosions of the adjacent bone were noted [Figure 1a and b].
Axial T2-weighted images (a), axial fluid-attenuated inversion-recovery (FLAIR) image (b), coronal T2-weighted image (c), coronal precontrast T1-weighted image (d) and coronal postcontrast T1-weighted image (e) showing nonenhancing cystic intensity lesion in the right jugular foramen (arrows). Note heterogeneous signal intensity on FLAIR image (arrow)
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F2
Further evaluation was performed with magnetic resonance imaging (MRI), which indicated an oval lobulated nonenhancing lesion causing expansion of the JF without any bone erosions [Figure 2a-e].
Axial diffusion-weighted image shows hyperintense signal of the right jugular foramen lesion (arrow), suggesting restricted diffusion within the lesion
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F3
It was hyperintense on T2-weighted and hypointense on T1-weighted images and showed very bright signal intensity on DWI [Figure 3].