PMC6399545_01
Axial CT demonstrating opacification of the mastoid air cells (solid arrow), ethmoid sinuses (arrowhead), and maxillary sinuses (dashed arrow) in keeping with mastoiditis and sinusitis.
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fig1
The CT brain showed opacification of the mastoid air cells as well as the ethmoid and maxillary sinuses in keeping with mastoiditis and sinusitis (Figure 1).
High resolution axial CT showing a focal osseous defect in the posterior mastoid (arrow).
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fig2
There was pneumocephalus with extra-axial air in the posterior cranial fossa bilaterally (Figures 2 and 3) and a focal osseous defect in the posterior wall of the right mastoid air cells causing direct communication with the posterior cranial fossa (Figure 4).
Axial CT brain demonstrating pneumocephalus in the posterior cranial fossa (arrowhead).
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fig3
There was pneumocephalus with extra-axial air in the posterior cranial fossa bilaterally (Figures 2 and 3) and a focal osseous defect in the posterior wall of the right mastoid air cells causing direct communication with the posterior cranial fossa (Figure 4).
Axial CT brain demonstrating pneumocephalus in the posterior cranial fossa (arrow).
CRIRA2019-7876494.004.jpg
PMC6399545_01_CRIRA2019-7876494.004.jpg
fig4
There was pneumocephalus with extra-axial air in the posterior cranial fossa bilaterally (Figures 2 and 3) and a focal osseous defect in the posterior wall of the right mastoid air cells causing direct communication with the posterior cranial fossa (Figure 4).