Following an accidental dural puncture during the placement of epidural
anesthesia, leakage of cerebrospinal fluid occurs. This leads to tugging on
intracranial pain-sensitive structures and causes a headache that is postural
in nature. According to radiology literature, the presence of retro spinal
fluid collections has been associated with the diagnosis of spontaneous
intracranial hypotension. The characteristic C1-C2 radiographic sign, called
the C1-C2 false localizing sign, can be found on magnetic resonance (MR) images
as a focal area of fluid-like signal intensity and on CT myelograms as a CSF
collection between the spinous processes of C1 and C2. As our case report
demonstrates, this sign is also associated with intracranial hypotension after
Cite this paper
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Findings in Spontaneous Intracranial Hypotension. AJNR American Journal of Neuroradiology, 195, 459-464. http://dx.doi.org/10.2214/AJR.09.3289