亚洲免费av电影一区二区三区,日韩爱爱视频,51精品视频一区二区三区,91视频爱爱,日韩欧美在线播放视频,中文字幕少妇AV,亚洲电影中文字幕,久久久久亚洲av成人网址,久久综合视频网站,国产在线不卡免费播放

        ?

        Vertebral Hemangioma 椎體海綿狀血管瘤

        2019-11-13 05:48:52Brant-ZawadzkiM,ChenMZ,MooreKR
        影像診斷與介入放射學(xué) 2019年5期
        關(guān)鍵詞:壓脂波點海綿狀

        Key Facts

        Definition: Benign vertebral body vascular tumor.

        Classic imaging appearance: Hypodense lesion (CT) with coarse, verticallyoriented trabeculae; hyperintense (MRI) on both T1WI and T2WI.

        Most common spinal axis tumor: (1) Incidental lesion identified on imaging performed for unrelated reasons.(2) Rarer presentation (clinical or radiographic) is “aggressive hemangioma”.

        Radiographic diagnostic criteria are lesion growth, bone destruction, vertebral collapse, absence of fat in lesion, and active vascular component.

        May extend epidurally and cause cord compression.

        CT Findings

        Best imaging clue: Well-circumscribed, hypodense lesion with coarse vertical trabeculae (“white polka dots”) on axial CT.

        Hypodense lesion centered in vertebral body.

        Sparse, thickened trabeculae surrounded by hypodense fat.

        “Spotted” appearance on axial images.

        Aggressive lesions show avid contrast enhancement.

        MR Findings

        Typical “benign” (fatty stroma) hemangioma: (1) T1WI--hyperintense, with avid contrast enhancement.(2) T2WI--hyperintense.(3) Occasional radiographically benign lesions are isointense or hypointense on T1WI, and difficult to distinguish from metastases.

        “Aggressive”(“malignant”) hemangioma: (1)T1WI--isointense to hypointense,with avid contrast enhancement.(2) T2WI--hyperintense.(3) Pathologic fracture or epidural extension common.(4) Clinically aggressive hemangiomas are usually radiographically aggressive as well.

        Other Modality Findings

        Plain film: Vertebral body lesion with coarse vertical trabeculae resembling corduroy.

        Angiography: Normal to hypervascular stain; aggressive lesions stain vividly.

        Imaging Recommendations

        Both CT and MR can permit a specific diagnosis.MR best demonstratesaggressive characteristics.Sagittal and axial T1WI images most useful to characterize composition.Axial T2WI and enhanced T1WI best for characterizing epidural extent and cord compromise (aggressive lesions).Axial bone algorithm CT is most useful for characteristic features that distinguish hemangioma from metastatic lesion.

        Angiography unnecessary unless embolization is being considered.

        醫(yī)學(xué)詞匯注釋與簡要講解

        vertebral 椎體的

        hemangioma 血管瘤

        trabeculae 骨小梁

        vertebral collapse 椎體塌陷

        epidural 硬膜外的

        polka dot 圓點、波點

        sparse 稀疏的

        stroma 基質(zhì)

        pedicles 椎弓根

        STIR sequence 短TI反轉(zhuǎn)恢復(fù)序列(壓脂)

        Stromata= stroma 基質(zhì)

        myelopathy 脊髓病變

        radiculopathy 神經(jīng)根病

        vertebroplasty 椎體成形術(shù)

        Fig 1 Typical (aggressive) hemangioma: a)~c)Axial CT shows a well-circumscribed T10 vertebral lesion with sparse, thickened trabeculae, destructive expansion into the epidural space and strong enhancement.d)Sagittal CT reconstruction.e)T1WI and f)T2WI show an iso-hyperintense T10 vertebral lesion with epidural expansion.

        Differential Diagnosis

        Vertebral metastases: (1) Characteristically extends into pedicles.(2) Hypointense on T1WI,hypointense to hyperintense(to marrow)on T2WI.(3)T1WI sequence helps distinguish from benign hemangioma.(4) May be difficult to distinguish from “vascular” or“agressive” hemangioma on CT.

        Focal Fatty Marrow: (1) Incidental rounded focus of marrow fat that is conspicuous on MRI.(2)STIR sequence will show marked lesion hypointensity.(3)Hemangiomas typically retain some high signal due to vascular components.

        Pathology

        General Path Comments: (1) Slow growing; (2) Capillary, cavernous or venous origin; (3) Cavernous hemangiomas most common.

        Epidemiology: (1) Common 10%-12% of adult population.(2) 25%-30%multiple; particularly in thoracic spine.(3) Peak incidence fourth to sixth decades.(4) Benign lesions M = F; aggressive lesions slightly more commonin women.

        Gross Pathologic-Surgical Features: (1) Vast majority confined to vertebral body proper.(2) May be small or occupy entire vertebral body.(3) Uncommonly involve posterior elements/pedicles (10%-15%).(4) Thoracic lesions are more often aggressive than at other locations.

        Microscopic Features: (1) Benign lesions show mature, thin-walled, endothelium-lined capillary and cavernous sinuses interspersed among sparse,osseous trabeculae and fatty stromata.(2) Aggressive lesions contain less fat and more vascular stromata.

        Clinical Issues

        Presentation: (1) Benign hemangiomas are incidentally discovered.(2) Symptomatic (aggressive) hemangiomas present with intense, localized spinal pain,myelopathy and/or radiculopathy from osseous expansion, pathologic fracture, and/or epidural extension.

        Treatment: (1) Benign (fatty) hemangiomas--no treatment necessary.(2)Aggressive hemangiomas--first-line therapy is vertebroplasty in conjunction with embolization and surgery as needed.

        Prognosis: (1) Benign (fatty) hemangiomas--incidental lesions, excellent prognosis.(2) Aggressive vascular hemangiomas--variable depending on size of lesion, degree of epidural extension, and presence/absence of cord compression.

        猜你喜歡
        壓脂波點海綿狀
        縱隔海綿狀血管瘤的影像學(xué)表現(xiàn)與病理對比分析(附4例報告)
        胸椎真菌感染誤診結(jié)核一例
        CT和核磁共振成像在顱內(nèi)海綿狀血管瘤的診斷效果觀察
        MR壓脂T2加權(quán)與彌散加權(quán)成像在合并肺不張的中心型肺癌中的應(yīng)用
        讓注意力到你身上來 波點的世界怎能錯過
        波點之美
        波點女孩
        頑趣波點
        Coco薇(2016年3期)2016-04-06 02:40:48
        MR壓脂T2WI/DWI及增強CT對肺癌與肺不張組織的顯像效果
        磁共振T2WI壓脂及T1WI壓脂增強序列在肛癰及肛漏診斷中的價值
        色噜噜狠狠色综合中文字幕| 色欲综合一区二区三区| 欧美在线 | 亚洲| 亚洲AⅤ无码日韩AV中文AV伦| 国产一区二区在线观看视频免费 | 国产精品久久中文字幕第一页| 久久久精品久久久国产| 亚洲av天堂在线视频| 狠狠色噜噜狠狠狠狠米奇777| 久久天天爽夜夜摸| 国产精品亚洲一区二区三区正片 | 欧美激情二区| 久久中文字幕av第二页| 久久黄色国产精品一区视频| 午夜色大片在线观看| 亚洲男人精品| 亚洲中文字幕诱惑第一页| 美腿丝袜诱惑一区二区| 欧美另类高清zo欧美| 中文字幕Aⅴ人妻一区二区苍井空 亚洲中文字幕久久精品蜜桃 | 高级会所技师自拍视频在线| 台湾无码av一区二区三区| 岛国大片在线免费观看| 亚洲国产精品一区二区| 厨房人妻hd中文字幕| 欧美 国产 日产 韩国 在线 | 女人与牲口性恔配视频免费| 久久熟女乱一区二区三区四区| 蜜桃臀av一区二区三区| 色拍自拍亚洲综合图区 | 无码无在线观看| 日本五十路人妻在线一区二区| 国产女主播精品大秀系列| 国产aⅴ夜夜欢一区二区三区| 69久久精品亚洲一区二区| 欲求不満の人妻松下纱荣子| 激情久久av一区av二区av三区 | 亚洲av无码久久寂寞少妇| 国产精品麻豆A在线播放| 国产三级视频不卡在线观看| 欧美金发尤物大战黑人|