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Our goal was to demonstrate the spectrum of neuroradiologic(CT,MR,and angiographic)findings in craniocervical arterial dissection(CAD)related to exercise or sporting activities and compare the diagnostic utility of CT, MRI and MR angiography(MRA).Computed tomography demonstrated infarction in four patients.At contrast angiography,a dissection was found in the artery supplying the region of infarction in all cases.A hyperdense artery was found by CT in two patients,which correlated with dissection of the artery or its parent artery on contrast angiography.Cranial MRI findings were seen in six patients(infarction in five,periarterial signal abnormality in five).Dissection was confirmed in all four patients with abnormal periarterial signal who underwent contrast angiography.Two patients with abnormal intracranial periarterial signal had corresponding abnormalities on MRA.False-negative cranial and cervical MRI and MRA studies were performed in one patient because the imaging volumes used for the cervical and intracranial MR examinations did not overlap.Four patients with normal intracranial arterial signal had dissection in the neck demonstrated by contrast angiography.Neuroradiologic findings of CAD can include infarction,a hyperdense artery on CT,abnormal periarterial signal on MRI, and a narrowed arterial signal column on MRA.Computed tomography is an insensitive screening examination.Proper use of MRI and MRA involves examination of both the head and the neck with overlapping imaging volumes of the two regions. |
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arterial dissection
arterial dissection,carotid
arterial dissection,intracranial
arterial dissection,vertebral
basilar artery
carotid angiogram
CAT scan
CAT scan,abnormal
CAT scan,dense artery sign
CAT scan,false negative
cerebrovascular accident
dense basilar artery sign
exercise
headache
misdiagnosis
MRI
MRI,abnormal
MRI,angiography
MRI,angiography,false negative
MRI,flow void,blood
neck pain
sports medicine,neurology of
vertebral artery
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