Sixty two patients, aged 15 days to 18 years, with congenital brain malformations were evaluated retrospectively to determine the association of various brain malformations with hippocampal abnormalities, in a study at Baskent University, Ankara, Turkey. Indications for MRI included seizures in 26, growth retardation in 10, headache (9), and microcephaly (4). Primary malformations included corpus callosum agenesis in 36, lissencephaly (9), and heterotopias (6), Hippocampal abnormalities were associated in 43 (69%) patients, and especially those with cortical dysplasia (100%), lissencephaly (78%), and corpus callosum agenesis (72%). [1]