Abstract
Objective To analyze the imaging features of congenital spinal deformity (CSD) associated with split cord malformation (SCM) and other intraspinal abnormalities, and to investigate the relationship to neurological symptoms. Methods 105 cases CSD with SCM were retrospectively studied. Analysis the imaging features of SCM (including type of SCM, location of SCM, location and apical vertebrae, symmetry of divided cord) and other intraspinal abnormalities. To investigate the relationship of the factors and neurological symptoms using Chi-square test of one factor and multiple factors logistic regression analysis. Results 28 cases (26.7%) were formation failure, 33 cases (31.4%) were segmentation failure, and 44 cases (41.9%) were combination of 2 disorders. 41 cases had neurological symptoms, 64 cases were asymptomatic. The distribution of SCM combined with spinal deformities: thoracic (11 cases), thoracolumbar (18 cases) and lumbar (20 cases) in type I SCM, thoracic (31 cases), thoracolumbar (20 cases) and lumbar (5 cases) in type II, none was in cervical. The location of SCM upper than apical vertebrae 29 cases, on apical vertebrae 25 cases, lower than apical vertebrae 51 cases. Spinal cord was splitted symmetric 27 cases and asymmetric 78 cases. 66 cases combined with other intraspinal abnormalities, lower conus 42 cases, syringomyelia 38 cases, meningocele 10 cases and sakrale zyste 5 cases. Associated with intraspinal abnormalities, the rate of neural symptoms was different. According to Chisquare test of one factor and multiple factors logistic regression analysis, lumbar SCM, spinal cord asymmetric and lower conus were related with neurological symptoms. Conclusion The predilection spinal deformity of type I is combination, type II SCM is segmentation failure. When SCM patients associated with other intraspinal abnormalities, the incidence of neurologic symptoms is increased. The lumbar SCM, hemicords asymmetry and lower lying conus have significant relationship with neurologic symptoms. Key words: Scoliosis; Neural tube defects; Syringomyelia; Spinal cord diseases
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