title: Spontaneous ventriculostomy and ventricular diverticulum.
abstract: Four cases of ventricular diverticulum are presented, 2 with spontaneous ventriculostomy. In 2 patients, the cause was monoventricular hydrocephalus through congenital stenosis of the foramen of Monro, with paraventricular diverticula and spontaneous ventriculostomy. Both patients had a cystic space in the quadrigeminal and supracerebellar cistern. In one patient during pneumoencephalography, the ventricular diverticulum filled via the ventriculostomy. The other 2 patients had congenital stenosis of the Sylvian aqueduct with the formation of a large supratentoria cyst connecting with the posterior part of the third ventricule.
mesh_terms: D001927:Brain Diseases / Q000000981:diagnostic imaging / Q000473:pathology; D002552:Cerebral Ventricles / Q000002:abnormalities; D014695:Cerebral Ventriculography; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000000981:diagnostic imaging* / Q000473:pathology; D007231:Infant, Newborn; D008297:Male; D011011:Pneumoencephalography; D012422:Rupture, Spontaneous