Introduction
Hemimetameric Segmental Shift (HMMS) is defined as a hemivertebral deformation in which two or more hemivertebra exists on both left and right sides of the spine, where the hemivertebras are separated by at least 1 normal vertebra. 3D-CT analysis done by Kawakami et al on congenital scoliosis patients proved the existence of mismatch among the anterior and posterior segments, where they coined this phenomenon as discordant anomaly. The purpose of this study is to analyze the morphology and determine clinical features of HMMS 3 dimensionally.