Diencephalic cysts

Abstract

✓ Four cases of extensive cystic dilatation of the third ventricle associated with agenesis of the corpus callosum are described. This condition is termed “diencephalic cyst”; the clinical and radiological features are described. The embryological development of the diencephalon, the telencephalon, and the corpus callosum are described in relation to this malformation. The associated hydrocephalus is also discussed. The treatment and clinical course of the patients is outlined.