PMC7451163_01
Preoperative magnetic resonance imaging (MRI); a: T1 + gadolinium, b: T2-fluid-attenuated inversion recovery (FLAIR), and asterisk: clival meningioma. Postoperative MRI, c and d, day 3, e, and f 1 year; T2-FLAIR. T: Temporal lobe. O: Occipital lobe.
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F2
Magnetic resonance imaging (MRI) showed three meningiomas, including one petroclival one showing growth at 1-year follow-up [Figure 2].
Diffusion tensor imaging tractography 4 years after surgery, fused with initial 2D postoperative fluid-attenuated inversion recovery (FLAIR) magnetic resonance imaging (MRI) (syngo.via, Siemens, Munich, Germany). The ILF and inferior fronto-occipital fasciculus (IFOF) are part of the ventral stream and join posteriorly. The superior longitudinal fasciculus (SLF) represents the dorsal stream. (a-d): the reconstructed inferior longitudinal fasciculus (ILF) (white asterisk and green fibers) and posterior part of the IFOF, including their junction with the SLF (black asterisk and blue fibers), are depicted on craniocaudal axial FLAIR slices in relation to the temporobasal hypersignal. (e): 3D VRT reconstruction of the SLF, IFOF, and ILF in relation to the temporal FLAIR hypersignal (white star and lines, at the junction of the three tracts) on axial and sagittal images.
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F3
After the fusion of postoperative images and tractography, the lesion was located at the junction of the inferior longitudinal fasciculus (ILF), the inferior fronto-occipital fasciculus (IFOF) and the superior longitudinal fasciculus (SLF) [Figure 3].