Magnetic resonance imaging of an intraventricular craniopharyngioma.

A case of a craniopharyngioma confined entirely to the third ventricle is reported. MRI revealed an isointense and high signal lesion on T1- and T2-weighted images, respectively, with homogeneous enhancement by Gd-DTPA. The tumor was reduced by 90% in 4 months after 60 Gy radiation therapy. Intraventricular craniopharyngioma is unusual and is not associated with tumoral calcification or cyst formation.