Hemorrhagic Colloid Cyst Presenting with Acute Hydrocephaly

Figure 2

Brain MRI. Axial FLAIR image (a) shows enlargement of lateral ventricles. The hyperintense rim around the ventricles represents interstitial edema secondary to acute hydrocephaly. Coronal T2-weighted image (b) reveals a round hypointense lesion at the location of interventricular foramen of Monro (arrow in (b)). The lesion (arrow in (c)) is isointense in the axial T1-weighted image (c). The size of the lesion is exaggerated in the b0 sequence of DWI image (d); a finding that suggests hemorrhage (arrow in (d)).

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