Certain disorders such as Ankylosing Spondylitis can cause severe kyphotic deformity of the cervical spine, also known as the Chin-on-Chest deformity. Such extreme kyphosis, can prevent raising the head and looking forward. In this case a spinal osteotomy might be considered. This operation involves cutting through the cervical vertebrea and realigning them into a position that allows better upright posture and a horizontal gaze.
