PMC6137291_01
Mass encasing the vertebral artery, internal jugular vein, and lateral process of the C1 vertebra.
CG-CGCR180052F001.jpg
PMC6137291_01_CG-CGCR180052F001.jpg
F1
The mass encased the vertebral artery, internal jugular vein, and lateral process of the C1 vertebra, for which he eventually required neurosurgical intervention due to atlantoaxial instability (Figure 1).