Atlas of Brain and Spine Oncology Imaging by Sasan Karimi

Author:Sasan Karimi
Language: eng
Format: epub
Publisher: Springer New York, New York, NY

Fig. 3.17Optic pathway glioma. Coronal fat-saturated T2-weighted (a) and contrast T1-weighted (b) images reveal an expansile nonenhancing glioma in the optic chiasm of a 19-year-old with neurofibromatosis type 1. Note the absence of normal internal carotid artery and proximal circle of Willis flow voids consistent with Moyamoya syndrome, one of many vascular lesions that may occur in neurofibromatosis type 1 (see Fig. 2.17a for normal arterial flow voids on a coronal T2-weighted image)

Fig. 3.18Optic pathway glioma. Axial noncontrast CT (a), FLAIR (b), contrast axial (c), and sagittal (d) T1-weighted images and coronal T2-weighted image (e) reveal an expansile complex cystic and solid, heterogeneously enhancing mass lesion in the region of the optic ­chiasm, hypothalamus, and optic tracts. Mass effect from the tumor compresses the third ventricle, causing obstructive hydrocephalus with dilatation of the lateral ventricles including the temporal horns

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