RT Journal Article SR Electronic T1 Brainstem seizures in hydranencephaly JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 1152 OP 1152 DO 10.1212/WNL.24.12.1152 VO 24 IS 12 A1 JOHN H. FERGUSON A1 MORRIS W. LEVINSOHN A1 IRAJ DERAKSHAN YR 1974 UL http://n.neurology.org/content/24/12/1152.abstract AB Article abstract A child with hydranencephaly had seizures typical for the neonatal period, including frequent clonic episodes and a paroxysmal electroencephalogram (EEG) with spikes, and at postmortem had no brain above the mesencepha-lon except for an unconnected hippocampal remnant. Seizures of several types and flattened or rarely paroxysmal EEGs have been described in hydranencephaly, but in none did autopsy show as incomplete a central nervous system as in the present case. Epileptic foci and neonatal seizures indistinguishable from those in which brain formation is normal may occur at a brainstem level when telencephalon and diencephalon are absent. Dener-vation and aberrant regeneration are possible epileptogenic mechanisms in the immature brain stem of this child.