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. 2019 Nov 19;11(6):1054–1063. doi: 10.1111/os.12553

Figure 4.

Figure 4

A 32 year old female with basilar invagination (BI) (A, B), OC2A and POCA of the patient were established in a non‐ideal angle in OCF (C). Follow‐up after surgery at 24 months showed that lower cervical curvature of the patient could be able to maintain better than that at postoperative/soon after surgery and ambulation (D). But another patient, a 41 year old male with BI (E, F), who had a severe loss of CSA and disc degeneration at 12 months follow‐up visit (H), established in an ideal reference range of his occipitocervical angle parameters during surgery (G).