Fig. 2From: Arnold–Chiari malformation type I and the posterior dislocation of the odontoid process aggravate prolonged weaning in a patient with severe viral pneumonia: a case reportMagnetic resonance image of the cervical spine. Arrows indicate tonsillar herniation to the first cervical vertebra with a posterior dislocation of the odontoid process and syringomyelia. The medulla and high cervical cord are compressed and deformedBack to article page