...kull bottom )、环枕正常(loop pillow malformation)、椎体融合(centrum fuse)、椎管闭合不全(vertebra duct close imcompliate)、终丝脂肪瘤(..
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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。
Conclusion: Each type of spinal dysraphism had its corresponding MRI features, MRI could diagnosis most of them precisely.
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.
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。
Another diagnosis to consider is a closed spinal dysraphism, where the vertebral arches are not fused well, but there is no vertebral column agenesis.
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