Fig. 17From: Magnetic resonance imaging of pineal region tumoursArachnoid cyst in a 27-year-old woman with headache and dizziness. Sagittal T2-weighted image (a) demonstrates a cystic infratentorial lesion (arrow) in the pineal recess, which has high signal. On coronal FLAIR image (b), the lesion (arrow) has isointense signal relative to CSFBack to article page