Fig. 26
From: Paediatric brainstem: A comprehensive review of pathologies on MR imaging
A 16-year-old male with headache and vomiting: a–b Axial FLAIR and T2-weighted sagittal MRI shows a relatively well-defined hyperintense lesion involving the tectum (arrow). The aqueduct is encased and compressed (dotted arrow) with resultant dilatation of the temporal horns (block arrow). c No significant contrast enhancement is noted in keeping with a glioma