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We analyzed the headaches in 50 patients with type I Chiari malformation. Of the 50,14(28%)had a rather specific,usually protracted,suboccipital- occipital headache of variable quality and duration that was aggravated by Valsalva's maneuver,effort,cough,or postural changes and relieved by occipital-suboccipital craniectomy.Only the degree of tonsillar herniation significantly correlated with the presence of this pain.Both migraine and tension-type headache occurred with the expected frequency for the general population. |
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