Klippel-Feil syndrome is a disorder that occurs in the cervical spine. This syndrome occurs due to an abnormal position of the bones in the baby's neck. Klippel-Feil syndrome is a rare hereditary condition in which the vertebrae in the cervical spine are joined together. As a result, the neck bones become stiff and difficult to move. The most obvious symptoms are a shortened neck and stiffness in the neck and spine. People with klippel feil syndrome can also experience hearing and vision problems.