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脑节细胞胶质瘤的MRI表现及临床病理分析 总被引:3,自引:1,他引:2
目的:探讨脑节细胞胶质瘤的MRI特点.方法:回顾性对13例脑节细胞胶质瘤的MRI资料并结合其临床病理进行分析.结果:病灶全部为单发.幕上12例,幕下1例.额叶5例,颞叶4例,顶叶2例,额颞叶、延颈髓各1例.其中11例为原发性肿瘤,2例为复发.4例肿瘤脑回样分布,6例呈椭圆形,3例呈不规则生长.T1WI为均匀低信号或等低信号,T2WI为高信号或混杂信号,T2水抑制像上肿瘤边缘和实性呈高信号,其他部分呈等偏低信号.肿瘤内有壁结节4例,扩散加权像(DWI)上呈低或等偏低信号,表观扩散系数(ADC)图呈ADC值升高.瘤周境界较清,多数病例水肿占位效应不明显,增强后肿瘤不强化、轻度强化,也有不规则强化.结论:节细胞胶质瘤MRI较有特征性,有助于术前正确诊断. 相似文献
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动态增强MR在节细胞神经瘤诊断中的应用 总被引:1,自引:0,他引:1
目的 分析节细胞神经瘤的MRI表现及其血液动力学特征,以提高其诊断准确性.方法 经手术病理证实的节细胞神经瘤9例,分别经MRI自旋回波T1WI、快速自旋回波T2WI、屏气扰相梯度回波T1WI动态增强扫描.仔细复习MRI扫描结果并和手术病理作回顾性对照分析.结果 9例节细胞神经瘤中,脊柱旁6例(颈部2例,纵隔1例,腹膜后3例),肾上腺3例.肿瘤直径3.7~16.4 cm,平均7.1 cm.SE T1WI为均匀低信号4例,混杂低信号5例;FSE T2WI显著高信号肿瘤3例,高低信号混杂5例,等信号1例.SPGR动态增强动脉期轻微强化,门脉期和延迟期为轻度进行性延迟强化.强化方式包括线条交织状强化6例,漩涡状强化2例,斑点状强化1例.3例肿瘤内血管强化.所有肿瘤境界清楚,瘤体自身受压变形7例,形成伪足样尖角4例.5例肿瘤推移邻近血管,所有与肿瘤解剖关系密切的血管形态正常.结论 节细胞神经瘤MRI征象具有特点,动态MR可提高诊断率. 相似文献
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恶性腱鞘巨细胞瘤1例 总被引:1,自引:0,他引:1
女,51岁。主因右大腿前外侧包块1年余入院。入院检查:右侧股骨下段前外侧软组织内可触及一10cm×12cm肿块,肿块移动度差,质韧,触之轻痛,边缘不清,与周同组织似有粘连,局部皮温不高,皮肤色泽和感觉正常,活动自如。影像学检查:右膝关节及股骨下段X线平片未见异常。CT平扫示股骨下段前方软组织肿块,密度大致均匀,与肌肉呈等密度,与周围肌肉组织分界不清(图1)。 相似文献
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目的 探讨成人单发肝脏胆管性错构瘤的影像学表现,以提高对本病的认识.方法 回顾性分析3例经手术、病理证实的单发肝脏胆管性错构瘤的影像学表现.男1例,女2例,年龄分别为28、43、76岁.3例均行B超和CT检查,1例还做MRI检查.结果 病灶长径为2~4 cm.本组肝脏胆管错构瘤的B超表现为:稍低或稍强回声,内部回声不均匀;CT表现为:平扫呈较均匀或不均匀的较低密度,增强扫描呈较均匀或不均匀轻中度强化,有延迟强化;1例MRI表现为:T1WI呈较低信号,T2WI呈较高信号,增强扫描呈环状强化.结论 成人单发肝脏胆管性错构瘤在影像学上无特征性表现,可类似于肝转移瘤、肝脓肿、肝海绵状血管瘤等常见的肝占位病变. 相似文献
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患者女,27岁。因头痛3 d 入院。既往体健,无疫区生活史,无家族遗传病史。查体:神志清,精神可,四肢肌力及肌张力正常,病理征阴性。颅脑 MRI 示:右侧基底节区、右侧丘脑可见不规则囊性病变,大小约28 mm×20 mm×22 mm,边界清,平扫呈长 T1长 T2信号(图1),FLAIR 序列呈低信号, DWI示病变扩散不受限,ADC 值高。病变周边可见大片状长T1长T2水肿信号。增强后囊壁呈轻度环形强化(图2)。PWI示病灶无明显的 rCBV升高区域(图3)。1 H MRS多体素检查:病灶囊液部分表现为 Cho 峰升高,NAA 峰降低(图4)。术前拟诊为胶质瘤。 相似文献
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患者女,41岁.因突发头痛,呕吐,意识障碍2 d入院.查体:神志不清,呼之不应,双瞳等大等圆,对光反射存在,脑膜刺激征(+),病理征(-).头部CT平扫示:双侧侧脑室、外侧裂池及三脑室见片状高密度影(图1).头部CTA示:颈髓、脑干见大量迂曲、增粗的畸形血管团,病灶为左侧大脑中动脉供血,经左侧大脑内静脉引流至大脑大静脉,引流动脉上见3个囊状动脉瘤. 相似文献
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Wu WC Chen CY Chung HW Juan CJ Hsueh CJ Gao HW 《AJNR. American journal of neuroradiology》2002,23(10):1775-1778
We present serial MR perfusion and spectroscopic findings of a pathologically proved low grade glioma, which evolved into glioblastoma multiforme in 2 years in a 24-year-old man. The initial MR imaging studies, including enhanced conventional T1-weighted and perfusion imaging, were characteristic of a benign glioma with the only exception being that multi-voxel proton MR spectroscopy showed malignant features with a high choline:phosphocreatine ratio. Postoperative follow-up MR imaging revealed findings consistent with malignant glioma, with increased angiogenesis on perfusion images and heterogeneous enhancement on contrast-enhanced T1-weighted images that were further confirmed by second surgery. We suggest conducting close MR imaging follow-up of patients with glioma who have discrepant MR spectroscopic and perfusion results after treatment. 相似文献
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Peripheral cerebral aneurysm associated with a glioma 总被引:1,自引:0,他引:1
C. S. Barker 《Neuroradiology》1992,34(1):30-32
Summary This 42-year-old man with acute subarachnoid, intraventricular and parenchymal hemorrhage from an angiographically and surgically confirmed successfully clipped, right splenial artery aneurysm, subsequently manifested a grade 3 astrocytoma at the site of the aneurysm. Intracranial aneurysms are recognized in association with metastases from cardiac myxoma and choriocarcinoma, but are rarely seen with primary brain tumors. In patients with nontraumatic peripheral aneurysms it would seem prudent to biopsy the aneurysm and/or surrounding necrotic tissue at the time of surgical clipping. 相似文献
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PET-CT将PET和CT有机结合,实现了优势互补,可更全面地检出病灶,诊断更准确;11C-蛋氨酸(11C-MET)是一种能被胶质瘤摄取的氨基酸,其在正常脑组织的摄取明显低于脱氧葡萄糖(FDG),可更好地显示胶质瘤。以11C-MET作为示踪剂的PET-CT在对胶质瘤的诊断、鉴别诊断、预后评价及治疗效果评价等方面优于CT、MRI和18F-FDG PET-CT。 相似文献