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为了探讨脊髓纵裂（ＤＭ）的分型和手术适应证，比较Ｘ线平片、ＣＴ和ＭＲＩ对ＤＭ的诊断价值。经手术证实的１３例ＤＭ，均有脊柱Ｘ线平片、平扫ＣＴ和ＭＲＩ。将ＤＭ分为有隔刺的Ⅰ型和无隔刺的Ⅱ型。Ⅰ型分为有完整隔刺的Ⅰａ型和不完整隔刺的Ⅰｂ型；Ⅱ型分为完全纵裂的Ⅱａ型和不全纵裂的Ⅱｂ型。结果：１３例ＤＭ中Ⅰａ型７例、Ⅰｂ型１例、Ⅱａ型４例、Ⅱｂ型１例。Ｘ线平片确诊ＤＭ５例，ＣＴ确诊１１例，ＭＲＩ全部正确诊断。８例Ⅰ型ＤＭ中５例为骨性隔刺，ＣＴ全部正确诊断，ＭＲＩ仅２例确定为骨性隔刺。结论：ＭＲＩ是诊断ＤＭ及其椎管内伴发病变的最有效方法，但对Ⅰ型ＤＭ骨性隔刺显示ＣＴ优于ＭＲＩ。有神经损害的Ⅰ型ＤＭ或无神经损害儿童Ⅰ型ＤＭ应尽早手术切除隔刺。
In order to investigate the classification and surgical indications of longitudinal incision (DM), the diagnostic value of X-ray, CT and MRI in DM was compared. 13 cases of DM confirmed by surgery, spinal plain X-ray, plain CT and MRI. Divided DM into septum type I and septum type II. Type Ⅰ is divided into Ⅰa type complete puncture and incomplete puncture Ⅰb type; Ⅱ type is divided into completely longitudinal split type Ⅱ a and incomplete split Ⅱ b type. Results: Thirteen cases of type Ia in 7 cases of DM, 1 case of type Ib, 4 cases of type IIa and 1 case of type IIb. X-ray diagnosis of DM5 cases, CT confirmed in 11 cases, MRI correct diagnosis of all. Five cases of type I DM were bone septum, CT was correctly diagnosed, only two cases of MRI were confirmed as septal septum. Conclusion: MRI is the most effective method to diagnose DM and its intracranial lesions. However, type Ⅰ DM bone septum shows that CT is better than MRI. Type 1 DM with nerve damage or type 1 DM without neurological damage should be surgically removed as soon as possible.