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Hydrocephalus and Arachnoid Cysts

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Abstract

The prevalence of intracranial arachnoid cysts (ACs) in children is comprised between 1% and 3%. Most of them are asymptomatic and no treatment is needed.

ACs can be divided into seven types: suprasellar, temporal, intraventricular, quadrigeminal, posterior fossa, convexity, and interhemispheric.

History, pathophysiology, epidemiology, clinical presentation, radiological diagnosis, classifications, association with hydrocephalus, surgical management and techniques, their outcome, and complications are discussed.

Three main techniques are available: open microsurgery, cyst and/or ventriculoperitoneal shunting, and endoscopic fenestration or a combination of these techniques.

Suprasellar, intraventricular, and quadrigeminal ACs appear to be the best indications for endoscopic fenestration with better outcome because of their position in the midline, in intimate relationships with the basal cisterns and ventricles. For a durable endoscopic treatment, the key point is to perform the largest and more fenestrations as possible, allowing a better restoration of cerebrospinal fluid (CSF) pathways. Cortical cysts seem to be best treated by open microsurgery or shunting. Shunt implantation showed a high rate of complications such as malfunctions, shunt dependency, slit cyst syndrome, or chronic tonsillar herniation that can be severe but appears to be the best treatment when indications are well chosen.

When ACs are symptomatic or if hydrocephalus is present, the best treatment remains to create communications between the cyst and normal CSF cisterns or ventricles, each time it is possible with the best mini-invasive single procedure. The amendment of neuroendoscopy tends to treat most of ACs, but microsurgical and shunting procedures still keep a place in selected cases.

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Abbreviations

3V:

Third ventricle

4V:

Fourth ventricle

AC:

Anterior commissure

AcoA:

Anterior communicant artery

Aq.:

Aqueduct

BA:

Basilar artery

BM:

Basal membrane of the arachnoid cyst

BV:

Basal vein

Cereb.:

Cerebellum

Ch.:

Optic chiasm

ChP:

Choroid plexus

clivus:

CN:

Caudate nucleus

Cyst:

Falx:

flocc.:

Flocculus

FM:

Foramen of Monro

GCV:

Great cerebral vein

Hipp.:

Hippocampus

I, II, III, IV, V, VI, VII, VIII, IX, X, XI, XII:

Cranial nerves

ICA:

Internal carotid artery

ICV:

Internal cerebral vein

Inf.:

Infundibulum

insula:

IPS:

Inferior petrosal sinus

JB:

Jugular bulb

LT:

Lamina terminalis

LV:

Lateral ventricle

MB:

Mamillary bodies

MCA:

Middle cerebral artery

MCF:

Middle cranial fossa

med. obl.:

Medulla oblongata

Mid.:

Midbrain

MN:

Mixes nerves

PC:

Posterior commissure

PCA:

Posterior cerebral artery

PCli:

Posterior clinoid

PcoA:

Posterior communicant artery

Petr. bone:

Petrous bone

pons:

PS:

Pituitary stalk

SP:

Septum pellucidum

Tent.:

Tentorium

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Acknowledgment

We gratefully acknowledge Dr LISTRAT Antoine from Clocheville Pediatric Hospital of Tours, Dr SPENNATO Pietro, Dr ALIBERTI Ferdinando, Dr RUGGIERO Claudio and Dr MIRONE Giuseppe from Santobono Children’s Hospital of Naples for their continuous support during production of this chapter by providing operative pictures and for their criticisms and suggestions.

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Correspondence to François Lechanoine .

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© 2018 Springer International Publishing AG, part of Springer Nature

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Lechanoine, F., Cinalli, G. (2018). Hydrocephalus and Arachnoid Cysts. In: Cinalli, G., Ozek, M., Sainte-Rose, C. (eds) Pediatric Hydrocephalus. Springer, Cham. https://doi.org/10.1007/978-3-319-31889-9_62-1

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  • DOI: https://doi.org/10.1007/978-3-319-31889-9_62-1

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-31889-9

  • Online ISBN: 978-3-319-31889-9

  • eBook Packages: Springer Reference Biomedicine and Life SciencesReference Module Biomedical and Life Sciences

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Chapter history

  1. Latest

    Hydrocephalus and Arachnoid Cysts
    Published:
    28 August 2018

    DOI: https://doi.org/10.1007/978-3-319-31889-9_62-2

  2. Original

    Hydrocephalus and Arachnoid Cysts
    Published:
    20 June 2018

    DOI: https://doi.org/10.1007/978-3-319-31889-9_62-1