Fig. 2From: Operative strategies for ankylosing spondylitis-related thoracolumbar kyphosis: focus on the cervical stiffness, coronal imbalance and hip involvementType IIA: TLK-AS with a stiff cervical spine. The modified CBVA method was used. A good vision and the centre of gravity over the hip axis were achieved comparing the photos and radiographs before operation and 24 months after operationBack to article page