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Subject 10. A 9-year-old girl involved in a motor vehicle collision. Initial sagittal (right, A; left, B) and coronal (C) CT images demonstrate substantial widening of the bilateral CCI. MR imaging examination (D) of the cervical spine performed 27 hours later demonstrates complete transection of the tectorial membrane (white arrow), complete transection of the posterior dural reflection at the craniocervical junction (block white arrow), and cord signal abnormality (open white arrow).
