Lateral recesses of the fourth ventricle.
D001932:Brain Neoplasms / Q000175:diagnosis; D002551:Cerebral Ventricle Neoplasms / Q000175:diagnosis; D002552:Cerebral Ventricles / Q000033:anatomy & histology*; D014695:Cerebral Ventriculography; D002817:Chordoma / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008579:Meningioma / Q000000981:diagnostic imaging; D008875:Middle Aged; D009442:Neurilemmoma / Q000000981:diagnostic imaging; D011011:Pneumoencephalography; D014054:Tomography