There are three types of hemorrhage involving the meninges:
- A subarachnoid hemorrhage is acute bleeding under the arachnoid; it may occur spontaneously or as a result of trauma.
- A subdural hematoma is a hematoma (collection of blood) located in a separation of the arachnoid from the dura mater. The small veins which connect the dura mater and the arachnoid are torn, usually during an accident, and blood can leak into this area.
- An epidural hematoma similarly may arise after an accident or spontaneously.
Other medical conditions which affect the meninges include meningitis (usually from fungal, bacterial, or viral infection) and meningiomas arising from the meninges or from meningeal carcinomatoses (tumors) formed elsewhere in the body which metastasize to the meninges.
Read more about this topic: Meninges
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