Arachnoid cyst epidemiology and demographics: Difference between revisions

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


==Epidemiology==
==Epidemiology==
Arachnoid cysts are seen in 4% of the population.<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" />


A study that looked at 2,536 healthy young males found a prevalence of 1.7% (95% [[Confidence interval|CI]] 1.2 to 2.3%). Only a small percentage of the detected abnormalities require urgent medical attention.<ref name="nmn">Weber F, Knopf H. "Incidental findings in magnetic resonance imaging of the brains of healthy young men", ''J Neurol Sci.'' 2006 Jan 15;240(1-2):81-4. Epub 2005 Oct 26. (PMID 16256141)</ref>
* The prevalence of arachnoid cysts is estimated to be about 1200 in 100,000 of the general population;<ref name=":0" />
* Arachnoid cysts are more prevalent in men;
* 50% occur in the [[middle cranial fossa]];
* One third of the cases occur in the [[Posterior cranial fossa|posterior fossa]];
* 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>


==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)