It is well-known that the scoliotic spine has three deformities on each of its three orthogonal planes. A scoliosis with abnormality on the sagittal plane is called lordoscoliosis or kyphoscoliosis. But it is not well-known whether scoliosis is more often complicated with lordosis or kyphosis. We studied one hundred and two scoliotic spines with mild curvature of less than fifty degrees, and seventeen normal spines as controls. The scoliotic spines with thoracic curvature had less degree of thoracic kyphosis and more degree of lumbar lordosis than normal spines. We also estimated the sagittal curvature limited in the three apical vertebrae of the scoliotic spines. In the cases of thoracic curvatures these values were significantly correlated with the degree of curvature on the coronal plane.
