Cervical kyphosis
The cervical spine naturally has a lordotic curve, so a kyphotic spinal deformity means there is an abnormal forward curvature to that part of the spine. The loss of the normal cervical lordosis might be localized, occurring in just one or a few segments of the vertebrae, or it can involve the majority of the cervical spine segments.
There is evidence documenting relatively frequent complications in stand-alone cage assisted anterior cervical discectomy and fusion (ACDF), such as cage subsidence and cervical kyphosis 1).
Cervical kyphotic deformity
1)
Cloward RB: The anterior approach for removal of ruptured cervical disks. 1958. J Neurosurg Spine 6:496-511, 2007