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“手术刀征”,大家见过吗?

2023-05-07 李永超Li Spine脊柱 发表于上海

脊柱矢状位MRI T2WI脊髓局部性扭曲并向前移位,扩大的背侧脑脊液间隙形似手术刀,称为“手术刀征”。

先看一个病例:

一名76岁的女性出现颈部和左臂疼痛。提供了矢状T2加权(1a和1b)和轴向T2加权图像(1c和1d)。结果是什么?你的诊断是什么?

影像发现:

胸椎的矢状T2加权图像(2a)在T2-3(括号)处显示“手术刀征”,脊髓的局灶性背侧凹陷(长箭头,2d)和蛛网膜下腔背侧增大。蛛网膜下腔背侧和腹侧均存在脑脊液伪影(短箭头,2b和2d)。相关的脊髓空洞(星号)出现,且刚好高于脊髓偏移水平(2b和2c)。在T2-3处也有一个小的中央椎间盘突出(箭头状)和纤维环撕裂。

影像诊断

T2-3背侧蛛网膜网带(dorsal arachnoid web,DAW)和脊髓空洞

背侧蛛网膜网带是一种位于髓外硬膜下的增厚的横行束带状(bands)或网状(webs)蛛网膜组织,压迫脊髓背表面,导致慢性脊髓压迫和畸形。带状物和网状物在形态上彼此不同,但引起的问题类似,都是引起脊髓的损害。一般来说,带是一个简单的加厚带状结构,而网是一个更复杂的网络样网带。

A为背侧蛛网膜束带,B为背侧蛛网膜网带

DAW多发生在中上段胸髓,因背侧蛛网膜网带的牵拉,可造成脊髓背侧局部受压凹陷、向前移位和背侧脑脊液间隙增宽,在MRI上呈现为一种特征性的影像表现,即“手术刀征”(scalpel sign)。同时,也常伴有脊髓受压平面上方的脊髓空洞。

对于不伴有脊髓空洞的DAW,MRI阅片时候要特别注意,不要漏诊。黄箭头处为该病典型的"手术刀征"

背侧蛛网膜网带。矢状面和轴向面提示背侧蛛网膜呈局灶性网带样,压迫脊髓,在矢状位表现为典型的“手术刀征”。脊髓腹侧脑脊液保持不变,而蛛网膜下腔背侧扩大

DAW需与腹侧脊髓疝 (ventral cord herniation)鉴别。矢状和轴向视图显示腹侧脑脊液丢失,部分脊髓通过小硬脑膜缺损(箭头)疝出。脊髓腹侧移位导致背侧蛛网膜下腔扩大,矢状面上出现“C”形背侧脊髓轮廓

腹侧脊髓疝

在国内,脊髓背侧蛛网膜网带主要是神经外科处理,及时发现,及时手术切除束带或网状带和脊髓空洞分流术,能挽回脊髓功能或阻止脊髓功能的恶化。大部分DAW病人及时手术治疗,预后较好。然而,这类病人有时因脊髓损害症状会就诊于骨科、脊柱外科和神经内科等科室,如不认识则可能会延误诊断与治疗,尤其是不伴有脊髓空洞的患者。

因此,应认识DAW特征性的影像表现“手术刀”征,及时请神经外科医生会诊或给患者指明诊治方向。

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  1. [GetPortalCommentsPageByObjectIdResponse(id=2130902, encodeId=314b2130902ba, content=学习打卡, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=940a5479132, createdName=ms2000000702445417, createdTime=Mon May 08 07:20:56 CST 2023, time=2023-05-08, status=1, ipAttribution=湖南省), GetPortalCommentsPageByObjectIdResponse(id=2130895, encodeId=6cc22130895c0, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200814/81d08245657a4a7f9a1ef713c0ec5878/ec4b201a22194a319b1aeb171bc6bb3d.jpg, createdBy=41e02111625, createdName=1581f8c42cm, createdTime=Mon May 08 06:59:00 CST 2023, time=2023-05-08, status=1, ipAttribution=宁夏), GetPortalCommentsPageByObjectIdResponse(id=2130850, encodeId=eeef213085073, content=不错,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=00332233446, createdName=1212ad1cm87暂无昵称, createdTime=Mon May 08 05:05:39 CST 2023, time=2023-05-08, status=1, ipAttribution=吉林省), GetPortalCommentsPageByObjectIdResponse(id=2130847, encodeId=08e3213084e14, content=不错,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210606/e8b96fdba070433da10cd357c0646807/28bf16f46e314caaad8396c0c7df7a04.jpg, createdBy=adb15496357, createdName=仁术2021, createdTime=Mon May 08 04:57:05 CST 2023, time=2023-05-08, status=1, ipAttribution=吉林省)]
    2023-05-08 ms2000000702445417 来自湖南省

    学习打卡

    0

  2. [GetPortalCommentsPageByObjectIdResponse(id=2130902, encodeId=314b2130902ba, content=学习打卡, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=940a5479132, createdName=ms2000000702445417, createdTime=Mon May 08 07:20:56 CST 2023, time=2023-05-08, status=1, ipAttribution=湖南省), GetPortalCommentsPageByObjectIdResponse(id=2130895, encodeId=6cc22130895c0, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200814/81d08245657a4a7f9a1ef713c0ec5878/ec4b201a22194a319b1aeb171bc6bb3d.jpg, createdBy=41e02111625, createdName=1581f8c42cm, createdTime=Mon May 08 06:59:00 CST 2023, time=2023-05-08, status=1, ipAttribution=宁夏), GetPortalCommentsPageByObjectIdResponse(id=2130850, encodeId=eeef213085073, content=不错,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=00332233446, createdName=1212ad1cm87暂无昵称, createdTime=Mon May 08 05:05:39 CST 2023, time=2023-05-08, status=1, ipAttribution=吉林省), GetPortalCommentsPageByObjectIdResponse(id=2130847, encodeId=08e3213084e14, content=不错,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210606/e8b96fdba070433da10cd357c0646807/28bf16f46e314caaad8396c0c7df7a04.jpg, createdBy=adb15496357, createdName=仁术2021, createdTime=Mon May 08 04:57:05 CST 2023, time=2023-05-08, status=1, ipAttribution=吉林省)]
    2023-05-08 1581f8c42cm 来自宁夏

    学习

    0

  3. [GetPortalCommentsPageByObjectIdResponse(id=2130902, encodeId=314b2130902ba, content=学习打卡, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=940a5479132, createdName=ms2000000702445417, createdTime=Mon May 08 07:20:56 CST 2023, time=2023-05-08, status=1, ipAttribution=湖南省), GetPortalCommentsPageByObjectIdResponse(id=2130895, encodeId=6cc22130895c0, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200814/81d08245657a4a7f9a1ef713c0ec5878/ec4b201a22194a319b1aeb171bc6bb3d.jpg, createdBy=41e02111625, createdName=1581f8c42cm, createdTime=Mon May 08 06:59:00 CST 2023, time=2023-05-08, status=1, ipAttribution=宁夏), GetPortalCommentsPageByObjectIdResponse(id=2130850, encodeId=eeef213085073, content=不错,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=00332233446, createdName=1212ad1cm87暂无昵称, createdTime=Mon May 08 05:05:39 CST 2023, time=2023-05-08, status=1, ipAttribution=吉林省), GetPortalCommentsPageByObjectIdResponse(id=2130847, encodeId=08e3213084e14, content=不错,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210606/e8b96fdba070433da10cd357c0646807/28bf16f46e314caaad8396c0c7df7a04.jpg, createdBy=adb15496357, createdName=仁术2021, createdTime=Mon May 08 04:57:05 CST 2023, time=2023-05-08, status=1, ipAttribution=吉林省)]
    2023-05-08 1212ad1cm87暂无昵称 来自吉林省

    不错,学习了。

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=2130902, encodeId=314b2130902ba, content=学习打卡, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=940a5479132, createdName=ms2000000702445417, createdTime=Mon May 08 07:20:56 CST 2023, time=2023-05-08, status=1, ipAttribution=湖南省), GetPortalCommentsPageByObjectIdResponse(id=2130895, encodeId=6cc22130895c0, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200814/81d08245657a4a7f9a1ef713c0ec5878/ec4b201a22194a319b1aeb171bc6bb3d.jpg, createdBy=41e02111625, createdName=1581f8c42cm, createdTime=Mon May 08 06:59:00 CST 2023, time=2023-05-08, status=1, ipAttribution=宁夏), GetPortalCommentsPageByObjectIdResponse(id=2130850, encodeId=eeef213085073, content=不错,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=00332233446, createdName=1212ad1cm87暂无昵称, createdTime=Mon May 08 05:05:39 CST 2023, time=2023-05-08, status=1, ipAttribution=吉林省), GetPortalCommentsPageByObjectIdResponse(id=2130847, encodeId=08e3213084e14, content=不错,学习了。, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210606/e8b96fdba070433da10cd357c0646807/28bf16f46e314caaad8396c0c7df7a04.jpg, createdBy=adb15496357, createdName=仁术2021, createdTime=Mon May 08 04:57:05 CST 2023, time=2023-05-08, status=1, ipAttribution=吉林省)]
    2023-05-08 仁术2021 来自吉林省

    不错,学习了。

    0

相关资讯

手术刀征特征图像

脑脊液在DAW水平的积聚导致蛛网膜下腔的扩张,随后对脊髓产生局部占位效应,脊髓向腹侧移位。这在MRI(矢状面)上产生了一个特征图像,被称为“手术刀征”。

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