PMC5721131_01
Axial T2-weighted Magnetic Resonance Imaging Scans of Patient 1 (A,B). A hypointense lesion with a hyperintense rim in the dorsal aspect of the right mesencephalon extending from the superior cerebellar peduncle to the mesencephalic-diencephalic transition zone.
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MRI at 5 months after the hemorrhage demonstrated a circumscribed lesion in the dorsal aspect of the right mesencephalon extending from the superior cerebellar peduncle up to the mesencephalic-diencephalic transition zone (Figure 1A,B).
PMC5721131_02
Axial T1-weighted Enhanced Magnetic Resonance Scans of Patient 2 (A,B). A tumor located in the right pontine and mesencephalic tectum and tegmentum.
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Initial MRI had demonstrated a small non-enhancing mesencephalic tumor, while recent studies showed an enhancing brainstem tumor located at the pontomesencephalic junction on the right side (Figure 2A,B).