Initial brain MRI. (a), (b) Axial T1-weighted image with gadolinium, showing the enhancing intra- and periventricular left occipitotemporal mass. There is minimal mass effect. In (b) there is a suggestion of a “daughter cyst” lateral to the main lesion. (c) Sagittal T1-weighted image, with gadolinium, showing the lesion mostly within the occipital horn of the lateral ventricle. (d) Coronal T1-weighted image with gadolinium. The abnormal tissue involves the parenchyma around the ventricle as well as within the lumen.
