Conclusion: Each type of spinal dysraphism had its corresponding MRI features, MRI could diagnosis most of them precisely.
结论：每型椎管闭合不全有相应的MRI表现特点，大多数MRI可准确诊断。
The opened spinal dysraphism reported in this series included 5 cases of posterior meningocele, 12lipomyelomeningocele and 2 myelocystocele.
本组开放性脊柱闭合不全包括后位脊膜膨出5例、脂肪脊髓脊膜膨出12例、脊髓囊状突出2例。
Conclusion MRI is the most effective modality for diagnosing occult spinal dysraphism in children nowadays. However, MRI has some limitations.
结论MRI是目前诊断儿童隐性神经管闭合不全的最有效的方法，但其也有局限性。
Another diagnosis to consider is a closed spinal dysraphism, where the vertebral arches are not fused well, but there is no vertebral column agenesis.
另一种鉴别诊断是闭合性的脊髓椎管闭合不全，同样椎弓没有融合，但没有脊椎发育不良。
Objective:To assess the ultrasonic diagnosis of lumbosacral spinal dysraphism(LSD)with tethered spinal cord(TSC)syndrome and to evaluate the ultrasonography value in postoperative follow up.
目的：观察超声在腰骶椎管闭合不全合并脊髓栓系综合征中诊断和术后随访的价值。
Objective:To assess the ultrasonic diagnosis of lumbosacral spinal dysraphism(LSD)with tethered spinal cord(TSC)syndrome and to evaluate the ultrasonography value in postoperative follow up.
目的：观察超声在腰骶椎管闭合不全合并脊髓栓系综合征中诊断和术后随访的价值。
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