PMC6727859_01
Patient's MRI and graphic test. (A-C) MRI shows the giant aneurysm compressing substantia nigra, red nucleus, basal ganglia, and thalamus. (C) Gadolinium enhancement of the residual open component of the aneurysm. (D) Complete removal of the aneurysm. (E and F) Patient's graphic tests before and after surgery.
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The lesion, a giant left middle cerebral artery bifurcation aneurysm with almost complete thrombosis, was compressing the left diencephalon, involving the thalamus, basal ganglia, and left upper mesencephalon at the level of substantia nigra and red nucleus (Figure 1).