Located, occurring, or existing outside the dura mater (the tough outermost membrane covering the brain and spinal cord).
From 'extra-' (outside) + 'dural' (relating to dura, from Latin 'dura' meaning hard). This medical term precisely describes anatomical location relative to brain membranes.
An 'extradural hematoma' is one of the most dangerous types of brain bleeding because it happens in the space between your skull and brain membrane—doctors can actually sometimes drain it without opening the brain itself, which is why the location name really matters.
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