Six-week follow-up, atlantooccipital dissociation Craniocervical alignment is within normal limits. Atlantoaxial interval is normal. Alignment of the remainder of the cervical spine is also maintained. There is no disruption involving the tectorial membrane or of the posterior longitudinal ligament inferiorly. Transverse ligament is also intact. Posterior ligamentous complex and anterior longitudinal ligaments also appear intact in the cervical spine.Previous seen collection (which was likely subdural) posterior to the cervical spine and posterior to the tentorial membrane has resolved. There is heterogeneity of the fat at the craniocervical junction ventral to the tectorial membrane (epidural space) without discrete residual hematoma. There is decrease in previously seen mild edema involving the lateral mass C1-C2 articulation. Mild joint fluid in the occipital condyle-C1 articulation is again seen and is nonspecific.No abnormal cord signal. No spinal canal or neural foraminal stenosis at any level in the cervical spine.
Findings are compatible with relatively mild ligamentous injury without frank ligamentous disruption at the craniocervical junction. Compared to 8/2/2015, there has been evolution of the findings with resolution of associated blood products. Please see details above.