PMC5938893_01
The presurgical magnetic resonance (MR) image depicting an enhanced solid haemangioblastoma in the cerebellopontine angle (a). Postsurgical MR image depicting the resection of the tumour (b). Right vertebral artery angiogram exhibiting a hypervascular tumour near the superior cerebellar artery (c and d)
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F1
Subsequent cerebral angiography identified feeding arteries from the superior cerebellar artery (SCA) and draining veins that converged onto the tentorial sinus [Figure 1].
Surgical view (a) and indocyanine green (ICG) videography (b-d) during an operation. The main feeding arteries (arrow) are first filled with ICG (b), followed by transit feeders (open arrowhead), and then by simultaneous filling of drainers (open arrow) approximately 4 seconds after the main feeding arteries are visualized (c). Finally, non-feeding arteries (arrowhead) are filled with ICG approximately 10 seconds after the main feeding arteries (d)
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F2
First, the feeding arteries from the SCA were visualized, then the draining veins as they were converging with the tentorial sinus, and finally the transit arteries were carefully identified [Figure 2].
PMC5938893_02
The presurgical magnetic resonance (MR) image demonstrating the enhanced solid haemangioblastoma in the cerebellum (a). The postsurgical MR image demonstrating the resection of the tumour (b). A Three-dimensional computed tomography angiogram during the late phase, exhibiting a draining vein (open arrowhead) flowing into the petrosal vein on the ventral side of the tumour (c). Left vertebral artery angiogram exhibiting a hypervascular tumour near the anterior inferior cerebellar artery and the posterior inferior cerebellar artery (d and e)
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F3
On cerebral angiography, feeding arteries were noted to arise from the left anterior inferior cerebellar artery (AICA) and left posterior inferior cerebellar artery (PICA), and both the draining veins to the petrosal vein and the inferior vermian vein were identified [Figure 3].
Surgical view (a) and indocyanine green (ICG) videography (b-e) during the operation. The main feeding arteries (arrows) are first filled with ICG (b and c), followed by transit feeders (open arrowhead) and the simultaneous filling of drainers (open arrow) approximately 8 seconds after the main feeding arteries are visualized (d). Finally, the non-feeding arteries (arrowhead) are filled with ICG approximately 15 seconds after the main feeding arteries are visualized (e)
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F4
The lesional veins drained into the inferior vermian vein [Figure 4].