Unilateraler Hydrozephalus bei membranösem Verschluß des Foramen Monroi

Abstract

A case of dilatation of the right lateral ventricle due to membranous occlusion of the foramen of Monro is reported. A child aged two and a half years developed raised intracranial pressure together with disturbed consciousness, but other neurological defect, two months after after an attack of bilateral broncopneumonia. The preoperative diagnosis of occlusion of the right foramen of Monro by infiltrating tumour was made angiographically. At operation the obstruction was found to be due to a membrane. The septum lucidum was fenestrated and a ventriculoatrial shunt was inserted. After a year the shunt was removed. Twenty eight cases of unilateral hydrocephalus due to nontumorous occlusion of the foramen of Monro have been reviewed, and the aetiologies have been discussed. Clinical picture and diagnostic procedures are reviewed. The authors discuss surgical treatment, and lay stress on fenestration of the septum lucidum.

Microanatomical Considerations for the Fenestration of the Septum Pellucidum

“…However, it may be caused by a wide range of lesions, including turnors, vascular malformations, infections such as ventriculitis or cysticerocosis, and inflarnrnatory conditions (7,26,27). Less commonly, congenital atresia of the foramen of Monro, obstruction by cavum pellucidum or vergae, or occlusion of the foramen by a membrane have been report ed (8,9,12,13,20 ). Sornetimes, unilateral shunting of hydrocephalic ventricles may result in unilateral hydrocephalus (3).…”

“…and surrounding structures was examined in ten adult brain s inject ed w ith silicone rubb er. The m ean anteroposterior length 01th e se ptum pellucidum was 41 mm (range 40-42).lts mean height was 13.11 mm (rang e [12][13][14][15] at th e level 01 th e loram en 01 Monro; 10mm (rang e 9 -11 ) at th e Irontal horns , and 8 mm (rang e 7 -10) at th e vent ricular at rium . One to thr ee septaI veins delimited 2 e r 3 avascular areas in the septum pellucidum.…”

“…The atrial segment is located at the ventricular arrium. between the tom iceal crux arid the pulvinar thalami.lts length averaged 12 Olm (range[10][11][12][13][14]. The temporal segment is conriguous with the atrial segment.…”

Unilateral Hydrocephalus due to Idiopathic Anomaly of Foramen of Monro, Treated Successfully With Endoscopic Technique. Report of Three Cases

“…Since 1842, when Von Mohr fi rst introduced the concept of unilateral hydrocephalus, this phenomenon has been considered uncommon [15] . Unilateral obstruction of the FOM causing unilateral hydrocephalus may be the result of tha-lamic and intraventricular neoplasia, colloid cysts, tuberculous masses, ventriculitis, vascular malformations and non-specifi c infl ammatory conditions [5,6,9,18] . The FOM, which has a diameter of 3 -4 mm, can be congenitally atretic, occluded by a membrane or malformed.…”

Familial congenital unilateral cerebral ventriculomegaly: Delineation of a distinct genetic disorder

“…Mild ventriculomegaly is assumed when the width of the atria of lateral ventricle is from 10 to 12 mm, moderate from 12.1 to 14.9, while severe when equal or exceeding 15 mm, which is often associated with an unfavorable outcome [Romero et al, 1988; Gaglioti et al, 2005]. Congenital unilateral severe ventriculomegaly or hydrocephalus is rarely described, with only few reports in the literature [Husag et al, 1976; Wilberger et al, 1983; Oi et al, 1985; Dorwling‐Carter et al, 1987; Gaston and Jones, 1989; Nakamura et al, 1989; Anderson et al, 1993; Tsao et al, 1996; Chudley et al, 1997; Schulman et al, 2000; Durfee et al, 2001]. Congenital unilateral ventriculomegaly associated with sensorineural hearing loss was assigned by Chudley et al 1997 who delineated the new autosomal recessive disorder “Chudley–McCullough syndrome” and further similar cases were described (OMIM 604213).…”