Non-enhanced CT demonstrates a mass lesion in the suprasellar cistern region extending to the anterior region of the third ventricle. The lesion is of mixed density. The inferior part of the lesion is linear and calcified while the superior part is globular, well defined, and intrinsically hyperdense.
The superior part of the lesion involves the anterior aspect of the third ventricle, causing secondary obstruction at the level of the foramen of Monro. The lateral ventricles are moderately dilated and there is periventricular white matter hypodensity consistent with transependymal edema, in keeping with acute hydrocephalus.