Arachnoid cyst classification: Difference between revisions
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{{Arachnoid cyst}} | {{Arachnoid cyst}} | ||
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==Overview== | ==Overview== | ||
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== Classification == | == Classification == | ||
=== Classification by cause === | |||
Arachnoid cysts can be classified by cause: | Arachnoid cysts can be classified by cause: | ||
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* Secondary: appear after trauma, infection, hemorrhage or surgery. Much less common. | * Secondary: appear after trauma, infection, hemorrhage or surgery. Much less common. | ||
=== Classification by symptoms === | |||
They can also be further classified regarding the symptoms that they cause, as proposed by Choi et al.: | They can also be further classified regarding the symptoms that they cause, as proposed by Choi et al.: | ||
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This classification is closely related with prognosis. Patients from the first group had significant improvement after surgery, the third group had a much smaller benefit while patients from the second group had minimal benefit.<ref name=":0">Fatima, Mustansir, Bashir Sanaullah, and Darbar Aneela. "Management of Arachnoid Cysts: A Comprehensive Review." ''Cureus'' (2018).</ref> | This classification is closely related with prognosis. Patients from the first group had significant improvement after surgery, the third group had a much smaller benefit while patients from the second group had minimal benefit.<ref name=":0">Fatima, Mustansir, Bashir Sanaullah, and Darbar Aneela. "Management of Arachnoid Cysts: A Comprehensive Review." ''Cureus'' (2018).</ref> | ||
=== Classification of spinal cysts === | |||
Nabors et al. suggested classifying arachnoid cysts of the spinal cord into three types: | |||
* Type I - extradural cysts without nerve root involvement; | |||
* Type II - extradural cysts with nerve root involvement; | |||
* Type III - intradural cysts.<ref>Kumar, Apoorva. "Spinal Arachnoid Cysts." ''Arachnoid Cysts''. Academic Press, 2018. 271-283.</ref> | |||
==References== | ==References== | ||
Revision as of 23:02, 23 June 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 may be classified according to cause into 2 subtypes/groups: primary or secondary, or according to symptoms into 3 groups.
Classification
Classification by cause
Arachnoid cysts can be classified by cause:
- Primary: developmental cysts, formed during the formation of arachnoid membranes in utero;
- Secondary: appear after trauma, infection, hemorrhage or surgery. Much less common.
Classification by symptoms
They can also be further classified regarding the symptoms that they cause, as proposed by Choi et al.:
- First group: present with hydrocephalus and intracranial hypertension;
- Second group: present with dizziness, headaches, large head, seizures, strabismus, developmental delays and skull deformation;
- Third group: minimal or no symptoms.
This classification is closely related with prognosis. Patients from the first group had significant improvement after surgery, the third group had a much smaller benefit while patients from the second group had minimal benefit.[1]
Classification of spinal cysts
Nabors et al. suggested classifying arachnoid cysts of the spinal cord into three types:
- Type I - extradural cysts without nerve root involvement;
- Type II - extradural cysts with nerve root involvement;
- Type III - intradural cysts.[2]