Pencil gliomas of the aqueduct of Sylvius. Report of two cases.
D000293:Adolescent; D001927:Brain Diseases / Q000175:diagnosis; D002535:Cerebral Aqueduct; D002551:Cerebral Ventricle Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003251:Constriction, Pathologic / Q000175:diagnosis; D003937:Diagnosis, Differential; D005910:Glioma / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D006849:Hydrocephalus / Q000175:diagnosis; D008297:Male; D014057:Tomography, X-Ray Computed