Fourth ventricle arachnoid cyst

Bonde, Vivek; Muzumdar, Dattatraya; Goel, Atul

doi:10.1016/j.jocn.2006.12.010

Cited by 11 publications

(21 citation statements)

References 7 publications

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“…All the animals of this series were young at the time of diagnosis and this is consistent with the theory that diverticula are developmental in origin. In human patients, arachnoid diverticula of the fourth ventricle mainly affect young patients, although some cases are diagnosed in adult or elderly persons . In our five dogs, three were unrelated female Border Collies.…”

Section: Discussionmentioning

confidence: 85%

Mri Characteristics of Fourth Ventricle Arachnoid Diverticula in Five Dogs

Bazelle

Caine²,

Paluš³

et al. 2014

Vet Radiology Ultrasound

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Intracranial arachnoid diverticula (cysts) are rare accumulations of cerebrospinal fluid (CSF) within the arachnoid membrane. The purpose of this retrospective study was to describe magnetic resonance imaging (MRI) characteristics of fourth ventricle arachnoid diverticula in a group of dogs. The hospital's medical records were searched for dogs with MRI studies of the brain and a diagnosis of fourth ventricle arachnoid diverticulum. Clinical characteristics were recorded from medical records and MRI studies were reinterpreted by a board-certified veterinary radiologist. Five pediatric dogs fulfilled inclusion criteria. Clinical signs included cervical hyperaesthesia, obtundation, tetraparesis, and/or central vestibular syndrome. In all five dogs, MRI findings were consistent with obstructive hydrocephalus, based on dilation of all ventricles and compression of the cerebellum and brainstem. All five dogs also had cervical syringohydromyelia, with T2-weighted hyperintensity of the gray matter of the cord adjacent to the syringohydromyelia. A signal void, interpreted as flow disturbance, was observed at the mesencephalic aqueduct in all dogs. Four dogs underwent surgical treatment with occipitalectomy and durotomy. A cystic lesion emerging from the fourth ventricle was detected in all four dogs during surgery and histopathology confirmed the diagnosis of arachnoid diverticula. Three dogs made excellent recovery but deteriorated shortly after surgery and were euthanized. Repeat MRI in two dogs revealed improved hydrocephalus but worsening of the syringohydromyelia. Findings from the current study supported theories that fourth ventricle arachnoid diverticula are secondary to partial obstruction of the central canal or lateral apertures and that arachnoid diverticula are developmental lesions in dogs.

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Section: Discussionmentioning

confidence: 85%

Mri Characteristics of Fourth Ventricle Arachnoid Diverticula in Five Dogs

Bazelle

Caine²,

Paluš³

et al. 2014

Vet Radiology Ultrasound

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“…Neither of the two dogs reported here had membranes or septations in the fourth ventricle visible on MRI. In human patients, the diverticula may not communicate with the CSF of the ventricle and this can be delineated with positive contrast ventriculography as a filling defect within the ventricle . In dog 1, a filling defect was not observed with contrast ventriculography performed postmortem, as the contrast medium entered and filled the fourth ventricle uniformly and was observed immediately exiting into the syrinx of the spinal cord.…”

Section: Discussionmentioning

confidence: 97%

Hydrocephalus secondary to obstruction of the lateral apertures in two dogs

Kent

Glass²,

Haley

et al. 2016

Aust Veterinary J

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“…A second operation was performed for patients during which the liquid content of the cyst was evacuated and cyst walls were excised. The patients' clinical condition improved after the cyst excision [19][20][21]. Nomura and associates have reported successful management of a complicated posterior fossa arachnoid cyst case via endoscopic fenestration [30].…”

Section: Discussionmentioning

confidence: 98%

“…They performed total cyst excision in one case and partial cyst excision in three cases in which they performed ventriculoperitoneal shunting. They concluded that a fourth ventricle arachnoid cyst causing hydrocephalus should be differentiated from a communicating hydrocephalus as patients with a fourth ventricle arachnoid cyst will not benefit from ventriculoperitoneal shunting without cyst excision [19]. Korouse and associates reported a case of arachnoid cyst of the fourth ventricle causing normal pressure hydrocephalus.…”

Section: Discussionmentioning

confidence: 99%

“…We think that there is still not enough information collected regarding the management and postoperative complications of arachnoid cysts extending from the fourth ventricle to the craniocervical junction. Cyst evacuation and excision of the cyst walls as much as possible should be performed to relieve patient symptoms according to the literature [19][20][21]. The reports associated with posterior fossa arachnoid cysts do not mention the patient position during suboccipital craniectomy and also the presence of any postoperative intracranial air.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Symptomatic Fourth Ventricle Arachnoid Cyst Extending to the Upper Border of the Dens of the Axis: A Case Report and Review of the Literature

Gülşen

2014

Open Access Maced J Med Sci

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Arachnoid cysts are congenital and non-tumorous intra-arachnoid fluid accumulations that make up about 1% of all intracranial space. occupying lesions. We report a patient with a fourth ventricle arachnoid cyst extending to the upper border of the dens of the axis. This patient progressively developed walking difficulty and stiffness in his legs together with difficulty in grasping objects with his hands within one year. The cyst was totally excised and the patient's symptoms improved in the early postoperative period, but he developed intraventricular and intracisternal air which was followed-up conservatively and resolved spontaneously

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Fourth ventricle arachnoid cyst

Cited by 11 publications

References 7 publications

Mri Characteristics of Fourth Ventricle Arachnoid Diverticula in Five Dogs

Mri Characteristics of Fourth Ventricle Arachnoid Diverticula in Five Dogs

Hydrocephalus secondary to obstruction of the lateral apertures in two dogs

Symptomatic Fourth Ventricle Arachnoid Cyst Extending to the Upper Border of the Dens of the Axis: A Case Report and Review of the Literature

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