Arachnoid cyst classification
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Arachnoid cysts can be intracranial (in the cranium), or on the spine. Intracranial arachnoid cysts usually occur adjacent to the arachnoidal cistern.[1] Spinal arachnoid cysts may be extradural, intradural, or perineural and tend to present with signs and symptoms indicative of a radiculopathy.[1] Arachnoid cysts can be relatively asymptomatic or present with insidious symptoms; for this reason, diagnosis is often delayed.
Classification
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.
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.[2]
References
- ↑ 1.0 1.1 Arachnoid cyst. (n.d.). Gale Encyclopedia of Neurological Disorders. Retrieved September 10, 2006, from Answers.com Web site: http://www.answers.com/topic/arachnoid-cyst
- ↑ Fatima, Mustansir, Bashir Sanaullah, and Darbar Aneela. "Management of Arachnoid Cysts: A Comprehensive Review." Cureus (2018).