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== Overview ==
== Overview ==
Arachnoid Cysts occur in about 1.2% of the general population and are more frequently seen in men than in women.
Arachnoid cysts occur in about 1.2% of the general population and are more frequently seen in men than in women.


==Epidemiology==
==Epidemiology==


* The prevalence of arachnoid cysts is estimated to be about 1.2% of the general population;
* The prevalence of arachnoid cysts is estimated to be about 1200 in 100,000 of the general population;<ref name=":0" />
* They are more frequently seen in men than in women;
* Arachnoid cysts are more prevalent in men;
* 50% occur in the middle cranial fossa;
* 50% occur in the [[middle cranial fossa]];
* One third of the cases occur in the posterior fossa;
* One third of the cases occur in the [[Posterior cranial fossa|posterior fossa]];
* Temporal cysts are 70% left-sided.<ref>Weber, Frank. "The Prevalence of Intracranial Arachnoid Cysts." ''Arachnoid Cysts''. Academic Press, 2018. 95-100.</ref>
* Temporal cysts are 70% left-sided.<ref name=":0">Weber, Frank. "The Prevalence of Intracranial Arachnoid Cysts." ''Arachnoid Cysts''. Academic Press, 2018. 95-100.</ref>


* Only 20% of these have symptoms, usually from secondary [[hydrocephalus]].<ref name="MassNeur">Flaherty AW. ''The Massachusetts General Hospital Handbook of Neurology'' 2000 Jan 1;105. (ISBN 0-683-30576-X)</ref>
* Only 20% of these have [[symptoms]], usually from secondary [[hydrocephalus]].<ref name="MassNeur">Flaherty AW. ''The Massachusetts General Hospital Handbook of Neurology'' 2000 Jan 1;105. (ISBN 0-683-30576-X)</ref>


==References==
==References==

Latest revision as of 15:37, 14 July 2020

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: José Eduardo Riceto Loyola Junior, M.D.[2]

Overview

Arachnoid cysts occur in about 1.2% of the general population and are more frequently seen in men than in women.

Epidemiology

  • The prevalence of arachnoid cysts is estimated to be about 1200 in 100,000 of the general population;[1]
  • Arachnoid cysts are more prevalent in men;
  • 50% occur in the middle cranial fossa;
  • One third of the cases occur in the posterior fossa;
  • Temporal cysts are 70% left-sided.[1]

References

  1. 1.0 1.1 Weber, Frank. "The Prevalence of Intracranial Arachnoid Cysts." Arachnoid Cysts. Academic Press, 2018. 95-100.
  2. Flaherty AW. The Massachusetts General Hospital Handbook of Neurology 2000 Jan 1;105. (ISBN 0-683-30576-X)