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X-ray showed that cervical fusion was achieved from C3 to C6 without migration of plate and screws at 12 months postoperatively (a, b). MRI showed the anterior migration of spinal cord at the level of C4 and C5, and at the level of caudal endplate of C3, the spinal cord turned sharply (c, d), and high information zone in the spinal cord was observed beneath the turning in T2 weight (d)
