Case of the Week
Section Editors: Matylda Machnowska1 and Anvita Pauranik2
1University of Toronto, Toronto, Ontario, Canada
2BC Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
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January 18, 2010
Arachnoid Cyst with Intracystic and Subdural Hematoma
- Arachnoid cysts are extracerebral, intra-arachnoidal cerebrospinal fluid collections that are most commonly found in the middle cranial fossa (50%).
- Most arachnoid cysts are asymptomatic; however, they can become symptomatic due to cyst enlargement or hemorrhage within the cyst.
- Hemorrhage may be spontaneous, follow minor trauma or severe trauma, and could be caused by ruptured intracystic or bridging vessels.
- Hemorrhage may also be isolated to the cyst or be associated with subdural and, rarely, extradural hematoma.
