PMC9892896_01
MRI before the first operation. (A) The posterior inferior cerebellar artery (arrow) touches the left glossopharyngeal nerve (arrowhead); (B) The SCA (arrow) compression of the left trigeminal nerve is not displayed clearly. SCA, superior cerebellar artery.
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F1
Four months prior, the patient underwent an MRI exam (Figure 1) and was diagnosed with left-sided GPN; he was treated with glossopharyngeal nerve MVD at another hospital.
MRI before the second operation. (A) The structure around the left glossopharyngeal nerve is disordered, and the original posterior inferior cerebellar artery (arrow) seems to be moved with no compression to the left glossopharyngeal nerve (arrowhead); (B, C) The left trigeminal nerve (arrowhead) touches the superior cerebellar artery (arrow).
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F2
Following admission to our hospital, the patient had a second MRI exam (Figure 2).
Teflon sponges (white arrow) separate small blood vessels away from the trigeminal nerve (red arrow).
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F3
Teflon sponge adhering to it (placed during the first operation) (Figure 3).
The SCA (white arrow) compresses the trigeminal nerve (red arrow). SCA, superior cerebellar artery.
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F4
We saw that the SCA was turned forward and downward, oppressing the trigeminal nerve (Figure 4), which was separated completely by the Teflon sponge.