PMC4533402_01
Computed tomography angiography showing a right-sided osteophyte and linked VA at the C5-6 and C6-7 levels in the patient. The dimensions of the bilateral VAs were similar. VA: vertebral artery.
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F1
The axial dimensions of the bilateral VAs were similar (Fig. 1).
A preoperative diagnostic angiography showing a normal right-sided VA in the neutral position that became an abnormal VA with two stenotic lesions at the C3-4 and C5-6 levels when the patient's head was turned to the right (arrows). VA: vertebral artery.
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F2
Diagnostic angiography showed that a normal right-sided VA in the neutral position became an abnormal VA with two stenotic lesions at the C3-4 and C5-6 levels when the patient's head was turned to the right (Fig. 2).
A left-sided VA showing a stenotic lesion at the C2 level when the patient's head was turned to the right on preoperative diagnostic angiography (arrow). VA: vertebral artery.
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F3
The normal left-sided VA also showed a stenotic lesion at the C2 level when the patient's head was turned to the right (Fig. 3).
A postoperative angiography showing that the overall flow of the right-sided VA was improved when the head was turned to the right. VA: vertebral artery.
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F4
On postoperative day 7, a follow-up angiography showed an improvement in the overall flow of the right VA when the patient's head was turned to the right (Fig. 4).
An intraoperative image (left) and postoperative computed tomography angiography (right) showing a decompressed VA (arrow) and the removal of the uncovertebral joint and the roof of transverse foramen. VA: vertebral artery.
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F5
Postoperative computed tomography angiography imaging demonstrated the removal of both the right uncovertebral joint at the C5-6 level and the roof of the C5 and 6 transverse foramen (Fig. 5).