Lumbar disk herniation: Do MR imaging findings predict recurrence after surgical diskectomy?
Lumbar disk herniation: Do MR imaging findings predict recurrence after surgical diskectomy?
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DOI：
10.1148/radiol.2352040624
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发表时间：
2005-05-01
期刊：
影响因子：
19.7
通讯作者：
Boos, N
中科院分区：
文献类型：
--
作者：
Dora, C;Schmid, MR;Boos, N
目得：回顾性评估，如果在磁共振（MR）成像的椎间盘退变和椎间盘突出体积的程度是危险因素复发disc herniation.MATERIALS AND METHODS：机构审查委员会允许这样的回顾性研究，和个人知情同意是不需要的。对30例复发性椎间盘突出患者（研究组）和30例术后至少2年未复发患者（对照组）（平均年龄42.2岁; 9例女性，21例男性）在初次椎间盘切除术前获得的MR成像结果进行比较。在T2加权矢状面MR图像上采用5分分级系统评估椎间盘退变（指示无退变; II级，椎间盘内水平低信号带; III级，不均匀椎间盘伴中等信号强度; IV级，椎间盘内外无区别; V级，低信号椎间盘塌陷）。椎间盘突出分为突出、脱出或隔离。测量受影响椎间盘和突出椎间盘材料的体积。定性和定量分析由两名读者进行。使用卡方检验比较分类变量。为了比较复发和未复发患者之间的椎间盘退变和体积，使用配对双尾t检验。结果：研究组中晚期椎间盘退变（IV级和V级）的发生率显著低于对照组（P
PURPOSE: To retrospectively evaluate if the-degree of disk degeneration and disk herniation volume at magnetic resonance (MR) imaging are risk factors for recurrent disk herniation.MATERIALS AND METHODS: The institutional review board permits such retrospective studies, and individual informed consent was not required. MR imaging findings obtained before initial diskectomy in 30 patients (mean age, 42.8 years; 10 women, 20 men) with recurrent disk-herniation (study group) and 30 patients (mean age, 42.2 years; nine women, 21 men) without recurrence for at least 2 years after surgery (control group) were compared. Disk degeneration was assessed on T2-weighted sagittal MR images with a five-point grading system (grade Indicated no degeneration; grade II, horizontal hypointense bands within disk; grade III, inhomogeneous disk with intermediate signal intensity; grade IV, no distinction between inner and outer parts of disk; and grade V, collapsed hypointense disk). Disk herniation was classified as representing protrusion, extrusion, or sequestration. The volume of both the affected intervertebral disk and the herniated disk material was measured. Qualitative and quantitative analyses were performed by two readers. The chi(2) test was used for comparison of categorical variables. For comparison of disk degeneration and volumes between patients with and those without recurrence, a paired two-tailed t test was used. Odds ratios based on the extent of disk degeneration were calculated for the entire sample.RESULTS: Advanced disk degeneration (grades IV and V) was significantly less frequent in the study group thin, in the control group (P