Fig 1.

Morphologic findings. Images show T1- and T2-weighted sagittal and axial sections of a healthy subject (row A), patient 1 (row B), patient 2 (row C), and patient 3 (row D). In the 3 patients, the mesencephalon shows an anterior bulging (black arrows) that fills the interpeduncular cistern, visible both on sagittal and axial sections. The signal intensity of the abnormal mass is like that of white matter. Patients also share the classic features of mesial temporal sclerosis: cerebellar hypodysplasia (black asterisks), a thickened and horizontal SCP (black arrowheads), and hypoplasia of the medullary pyramids and inferior olivary nuclei (white arrowheads).