Autonomic seizures and autonomic status epilepticus in early onset benign childhood occipital epilepsy (Panayiotopoulos syndrome).

To study clinical and EEG features of children with ictal vomiting and no underlying brain lesions (Panayiotopoulos syndrome). The subjects were 36 children aged 2-13 years. The onset of seizures occurred between 1 and 5 years of age. Fourteen children (38.8%) had a single seizure. Fourteen children (38.8%) had autonomic status epilepticus. Impairment of consciousness was reported in 30 (83.3%) children, eye deviation in 10 (27.7%) other autonomic symptoms and head deviation in 9, generalization in 8, visual symptoms in one child, and, speech arrest or hemifacial motor symptoms in 8 cases. The EEG showed occipital spikes or spike-wave complexes in 27 (75.0%) children, blocked by opening of the eyes in 8 (22.2%) cases. Nine patients (25%) also had rolandic spikes and 3 had extraoccipital spikes. Six (16.6%) patients had normal EEG. No clinical differences were observed between patients having occipital or extraoccipital spikes. In children only with autonomic seizures, the spikes are predominantly occipital but blockage by opening of the eyes is a less frequent feature. In some children there is an overlapping of different focal childhood idiopathic syndromes.