Natural History, Neuroradiological Workup, and Management Options of Chronic Atlantoaxial Rotatory Fixation Caused by Drug-Induced Cervical Dystonia

Figure 4

CT after the second reduction, revealing the fracture of the C2 lateral mass (yellow circle). (a) Axial view of C1, (b) axial view of C2, and (c) coronal view. Atlantoaxial rotatory subluxation remained, although the C1-C2 rotatory angle decreased to 30 degrees.

(a)

(b)

(c)