Fig. 8
From: “Unforgettable” – a pictorial essay on anatomy and pathology of the hippocampus
IHI associated with other developmental anomalies. Coronal T2-weighted image in a 22-year-old male patient with mental retardation and epilepsy (a) shows incomplete inversion of the right hippocampus (white asterisk at the collateral sulcus) along with a right perisylvian open lip schizencephaly (white arrows), right perisylvian subependymal heterotopia (white arrowheads) and agenesis of the septum pellucidum. Coronal T2-weighted images in a 25-year-old patient with mental retardation and epilepsy (b) shows agenesis of the corpus callosum and an abnormal globular shape of both hippocampi, corresponding to a bilateral incomplete hippocampal inversion