okri B. Low cerebrospinal fluid pressure headache. In: Headache, 24 Goadsby PJ, Silberstein SD (Eds), Butterworth-Heinemann, Boston 1997. p.355. 25 Vishteh AG Schievink WI Baskin JJ Sonntag VK. Cervical bone spur presenting with spontaneous intracranial hypotension. Case report. J Neurosurg 1998. 89:483.