Fig. 1.

Computed tomogram (CT) shows enlargement of both lateral ventricles which is caused by 3 cm sized multi-lobular calcified mass with slightly peripheral rim enhancement. It is located at the foramen of Monro in the third ventricle and seems to be close to the left thalamus parenchyme partially (A). Magnetic resonance image (MRI) reveals a relatively well-delineated third ventricular mass with heterogeneous signal intensities in the center of lesion on T1-weighted image (B). Typical peripheral hemosiderin rim of low signal intensity is not delineated on T2-weighted image (C). Minimal peripheral enhancement at the right posterior portion of the mass is seen on enhanced T1-weighted image (D). There is a minimal perilesional edema in the left thalamus on the FLAIR image (E). The mass around foramen of Monro is seen on enhanced sagittal T1-weighted image (F).