[Clinical features of unruptured vertebral artery dissection presenting as isolated occipital headache and/or neck pain].
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Vertebral artery dissection(VAD)presenting as isolated occipital headache and/or neck pain is being increasingly diagnosed because of the development of magnetic resonance imaging(MRI). While a majority of the patients diagnosed with this condition shows a favorable prognosis, the pain may be a predictor of fatal stroke in some patients. We aimed to find out the features of headache with VAD, identify the clinical manifestations indicative of VAD, and determine the ideal diagnostic approach to this condition to avoid fatal stroke. We reviewed medical records of 41 consecutive patients who showed VAD with isolated headache and were diagnosed between 1995 and 2008. All patients experienced pain in the occipitocervical area ipsilateral to the affected VA. Pain showed a sudden onset in 21(51%)patients, was persistent over several days in 31(76%)patients, and was severe enough to disable daily life activities in 34(83%)patients. Progression of stenosis or aneurysmal dilatation of the vessel was identified on follow-up imaging(angiography, magnetic resonance angiography)in 7 patients(17%), and was found within 14 days after pain onset in 6 of these patients(86%). Patients with persistent, severe, and unilateral pain in the occipitocervical area should undergo MRI examination, including surface anatomy scanning(SAS)imaging, and the possibility of VAD should be considered in their diagnosis. Once VAD is diagnosed, the patient should undergo meticulous blood pressure control, bed rest, and repeated MRI examination for at least 2 weeks after onset.