Injuries involving the<unk> , can result in a hemorrhage and two types of hematoma. * 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 bridging veins that connect the dura mater and the arachnoid are torn, usually during an accident, and blood leaks into this area. * An epidural hematoma, bleeding between the dura mater and the skull, may arise after an accident or spontaneously. Other medical conditions that affect the<unk>  include meningitis (usually from a fungal, bacterial, or viral infection) and meningiomas that arise from the<unk> , or from<unk> l carcinomatoses (tumors) that form elsewhere in the body and metastasize to the<unk> .
Meninges
Meningism
Seroma
Brain abscess
Meningitis
Encephalitis
Leptomeningeal cancer
Meningoencephalitis