title: Benign cyst of the paramedian pontine tegmentum.
abstract: A benign ovoid cyst, without an epithelial lining, localized in the paramedian pontine tegmentum, was examined by computed tomography (CT) and magnetic resonance imaging (MRI) (25 x 15 x 15 mm) and successfully operated upon. The one-and-a-half syndrome (horizontal gaze palsy to the right and paralysis of adduction of the right eye) and ipsilateral "peripheral" VII nerve palsy dominated the clinical picture. Fenestration, 5 mm in diameter, of the cyst wall through the floor of the IV ventricle was performed and 2.6 ml of clear, colorless fluid was evacuated. Inspection of the cyst, using the operating microscope, revealed a smooth, white, glistening cavity with no evidence of other pathological tissue. Duraplasty was performed with allogenic pericardium. Neurological symptoms improved immediately after surgery. Light and electron microscopy of the cyst wall revealed a fibrillar astroglial network and fragments of ependyma at the ventricular side of the biopsy.
authors.affiliation: Department of Neurosurgery, Medical Faculty Charles University, Hradec Králové, Czechoslovakia.
authors.forename: J
authors.initials: J
authors.lastname: Parízek
authors.forename: S
authors.initials: S
authors.lastname: Nĕmecek
authors.forename: J
authors.initials: J
authors.lastname: Spacek
authors.forename: J
authors.initials: J
authors.lastname: Nĕmecková
authors.forename: J
authors.initials: J
authors.lastname: Lízler
authors.forename: M
authors.initials: M
authors.lastname: Sercl
authors.forename: J
authors.initials: J
authors.lastname: Vokurka
authors.forename: P
authors.initials: P
authors.lastname: Mĕricka
authors.forename: Z
authors.initials: Z
authors.lastname: Vanásková
mesh_terms: D000293:Adolescent; D001927:Brain Diseases / Q000175:diagnosis / Q000601:surgery; D003560:Cysts / Q000175:diagnosis / Q000601:surgery* / Q000648:ultrastructure; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008854:Microscopy, Electron; D011149:Pons; D014057:Tomography, X-Ray Computed