Letters to the Editor

Sentinel Headache: A Warning Sign Preceding Every Fourth Aneurysmal Subarachnoid Hemorrhage

H. Joswig, J.Y. Fournier, G. Hildebrandt Department of Neurosurgery Cantonal Hospital St. Gallen St. Gallen, Switzerland M.N. Stienen Department of Neurosurgery Cantonal Hospital St. Gallen St. Gallen, Switzerland Department of Neurosurgery Hôpitaux Universitaires de Genève Geneva, Switzerland With great interest,

Panhypopituitarism with Ectopic Posterior Pituitary Lobe, Heterotopia, Polymicrogyria, Corpus Callosum Dysgenesis, and Optic Chiasm/Nerve Hypoplasia: Is That an Undefined Neuronal Migration Syndrome?

N.C. Örena aDepartment of Radiology E. Cagıltayb bDepartment of Endocrinology F. Akayc and S. Toyranc cDepartment of Ophthalmology Izmir Military Hospital, Izmir, Turkey We read with interest the article by Mitchell et al1 of 4 cases of ectopic posterior pituitary