Fig. 6. Schematic illustration in the coronal plane showing normal ventricles (A) and a large right-sided supratentorial mass lesion causing midline shift and compression of the right lateral ventricle (B). T1-weighted coronal (C) and fluid attenuated inversion recovery axial magnetic resonance (D) images of a patient with a large right-sided frontal tumor causing compression of the lateral ventricle, subfalcian herniation, midline shift causing obstruction of the foramen of Monro and dilation of the left lateral and temporal horns.