PMC8326134_01
Tension pneumocephalus after repeat microvascular decompression. (a-f) Respectively, caudal to rostral serial computed tomography images of the head without contrast material obtained preoperatively showing significant pneumocephalus in the posterior fossa in the previous microvascular decompression surgical corridor as well as the bilateral inferior frontal areas.
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F1
A noncontrast computed tomography (CT) scan of the head revealed significant volumes of air intraventricularly and in the subdural space, predominantly in the infratentorial space as well as small volumes in the inferior frontal spaces [Figure 1].
Postoperative day 2 CT scan of the head without contrast material. (a-f) Respectively, caudal to rostral serial images demonstrating mostly resolved pneumocephalus.
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F2
By postoperative day 2, there was gradual reduction of the air and decreased mass effect from the large collection of air in the fourth ventricle/posterior fossa [Figure 2].
Three-month magnetic resonance images obtained at the time of the follow-up visit. (a-d) Respectively, caudal to rostral axial T2-weighted imaging sequence revealing resolved pneumocephalus.
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F3
At the 3-month follow-up, brain MRI demonstrated completely resolved pneumocephalus [Figure 3].