Figure 4. Digital subtraction angiography with early and late phase demonstrating (A) left subclavian artery occlusion with (B) retrograde vertebral filling of proximal subclavian artery.

The following inclusion criteria were used: (1) At least one hemivertebra is located in the subaxial cervical area (C3–7); (2) At least one segment of subaxial cervical hemivertebra needs to be ...