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(A) Non-contrast CT Head demonstrates a lesion at the Foramen of Monro causing obstructive hydrocephalus. (B) MRI brain T1 axial study with contrast demonstrates enhancement of lesion at the Foramen of Monro. (C) MRI brachial plexus STIR sequence shows diffuse enlargement with marked T2 hyperintensity of the left brachial plexus.
