In this case, we report a unique spontaneous
intracranial EDH development in the context of
rapid shifts in CSF pressure following LP. CSF
hypotension is the culprit for the common orthostatic
post-LP headache and has even, when especially
severe, led to several documented cases of intracranial
SDHs. Decreased buoyancy of the brain causes
traction on supporting structures that tear bridging
veins, leading to the SDHs.There have been no prior
reports, however, of nontraumatic intracranial EDH
following a traditional LP.