PMC5757098_01
Axial CT image with bone window settings shows enlargement of left jugular foramen (*).
CRIRA2017-7047696.001.jpg
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fig1
The lesion had caused expansion in the adjacent bones (Figure 1).
Axial CT image with the soft tissue window settings shows a low-density pouch herniated to the jugular foramen (*).
CRIRA2017-7047696.002.jpg
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fig2
Its density was similar to that of cerebrospinal fluid (CSF) (Figure 2).
Axial T2 weighted image shows CSF and meninges herniated to the left jugular foramen (*).
CRIRA2017-7047696.003.jpg
PMC5757098_01_CRIRA2017-7047696.003.jpg
fig3
An enlarged left jugular foramen with a pouch was observed, extending from the left cerebellopontine angle cistern (Figure 3).
Axial postcontrast T1 weighted image shows CSF and meninges herniated to the left jugular foramen without enhancement (*).
CRIRA2017-7047696.004.jpg
PMC5757098_01_CRIRA2017-7047696.004.jpg
fig4
Enhancement and diffusion restriction were not found following the administration of a gadolinium-based contrast agent (Figure 4), nor obvious herniations of brain parenchyma.