脑膜瘤生物学特性与MRI信号特征的相关性研究

目的探讨脑膜瘤手术前MRI信号特征对手术中肿瘤生物学特性的预测价值。方法以WHO 2000年脑膜瘤病理分类为基础，追踪研究85例脑膜瘤患者，寻找肿瘤MRI信号特征与生物学特性，包括供血、质地以及瘤一脑界面是否清楚及其内在联系。结果不同病理亚型的脑膜瘤，表现出不同的MRI信号特征和生物学特性。多数良性脑膜瘤MRI信号均匀、形态规则，肿瘤周围水肿由肿瘤生长部位决定。非典型脑膜瘤MRI信号不均匀、形态不规则，肿瘤周围水肿不明显，间变型脑膜瘤周围水肿则非常明显。血管瘤型、间变型和部分非典型脑膜瘤血供丰富。微囊型、多数上皮型和多数血管瘤型脑膜瘤质地偏软，纤维型、化生型和砂粒体型则质地偏韧、硬。间变型、部分非典型和部分血管瘤型脑膜瘤的瘤一脑界面不清楚。结论脑膜瘤MRI信号特征的分析能为判断其病理亚型和生物学特性提供线索，有助于临床上制定手术策略，提高疗效。     

非典型脑膜瘤和良性脑膜瘤术后复发危险因素的初步分析

目的比较非典型脑膜瘤和良性脑膜瘤术后复发的影响因素。方法 442例脑膜瘤患者按照病理诊断结果分为良性脑膜瘤组415例及非典型脑膜瘤组27例,比较两组患者临床病理特征,并采用单因素分析法及多因素Logistic回归分析法分析两组患者术后复发的危险因素。结果与良性脑膜瘤组比较,非典型脑膜瘤组的肿瘤直径5 cm,肿瘤边界不清,手术非全切,术后放疗及术后复发患者更多。非典型脑膜瘤组的单因素分析发现,肿瘤大小(P=0.002)和手术切除程度(P=0.032)对其术后复发有显著影响。多因素Logistic回归分析结果显示肿瘤全切(OR=0.034,95%CI:0.003~0.399,P=0.007)是非典型脑膜瘤术后复发的唯一保护因素。良性脑膜瘤组单因素分析显示肿瘤大小,边界和手术切除程度对术后复发有显著影响(均P=0.000);多因素分析发现肿瘤最大直径5 cm(OR=14.916,95%CI:5.384~41.329,P=0.000)是良性脑膜瘤术后复发的危险因素,肿瘤边界清楚(OR=0.184,95%CI:0.075~0.453,P=0.000)和肿瘤全切(OR=0.034,95%CI:0.012~0.095,P=0.000)均是良性脑膜瘤术后复发的保护因素。结论手术非全切是非典型脑膜瘤术后复发的危险因素。良性脑膜瘤术后复发的危险因素包括肿瘤最大直径5 cm、肿瘤边界不清和非全切除。     

非典型性和恶性脑膜瘤的CT、MRI诊断

目的探讨非典型性和恶性脑膜瘤的CT、MRI表现,提高术前诊断率。方法收集经病理诊断证实为非典型或恶性脑膜瘤患者36例,术前均进行CT、MRI平扫和增强检查。结果 CT表现为肿瘤呈混杂、等、低密度影,缺少钙化,可伴有出血,骨质呈破坏性改变;MRI T1WI均呈不规则混杂信号,以等、低信号为多见,T2WI以高等混杂信号为多见。增强扫描,肿瘤多显著强化,且以不均匀强化常见,肿瘤形态多不规则,呈分叶状,边界模糊。结论 CT、MRI检查能充分显示肿瘤信号、边界、囊变、坏死、钙化、瘤周水肿、瘤内出血及肿瘤血供等情况,对非典型性或恶性脑膜瘤进行准确的诊断和术前评估。     

非典型性脑膜瘤及恶性脑膜瘤预后的相关因素分析

目的总结非典型性脑膜瘤(atypical meningioma,AM)及恶性脑膜瘤治疗中的经验,分析与其预后相关的主要临床因素。方法整理2004-10—2014-02就诊于我院的96例非典型性及恶性脑膜瘤患者的相关资料,包括性别、年龄等一般资料及远期生活质量评分(Karnofsky performance scale score,KPS评分)、生存期(overall survival,OS)、无进展生存期(progressionfree survival,PFS)、病理结果等。结果 96例患者中68例非典型性脑膜瘤和28例恶性脑膜瘤。80.9%非典型性脑膜瘤患者和67.9%恶性脑膜瘤患者手术达到SimpsonⅠ~Ⅲ级切除;31例(44.1%)非典型性脑膜瘤患者和19例(71.4%)恶性脑膜瘤患者术后进行放疗。中位随访时间25个月,恶性脑膜瘤患者总生存期较非典型性脑膜瘤更短,手术结合术后放疗的无进展生存期长于单纯手术治疗。结论对于非典型性脑膜瘤及恶性脑膜瘤,手术全切肿瘤非常重要,且术后放疗可延长患者生存期。     

脑膜瘤MRI与病理对照研究

目的 探讨脑膜瘤ＭＲＩ征象与病理关系。方法 ４１例脑膜瘤的ＭＲＩ特征与手术病理对照分析。结果 不同组织亚型脑膜瘤Ｔ１ＷＩ及Ｔ２ＷＩ信号强度均无显差异（Ｐ〉０．０５）。４１例中有完整包膜２５例,而７例包膜明显不完整同时伴瘤脑界面不清;１６例肿瘤血管丰富瘤周水肿多较明显;２４例显示硬膜“尾”征,其中１８例有肿瘤细胞浸润。结论 脑膜瘤的ＭＲＩ征象同理亚型无明显相关性。     

脑膜瘤的生长及对瘤周脑结构的影响

本文通过对34例脑膜瘤病人CT诊断、光镜检查,手术中瘤脑界面观察以及病理诊断,发现其闻有一些内在联系;CT平扫瘤脑界面清楚者,光镜检查多属光滑型,病检多属纤维型脑膜瘤,呈膨胀性生长,肿瘤直径≤40mm,瘤周无水肿或轻度水肿。相反,CT乎扫瘤脑界面模糊,无论肿瘤大小,光镜检查多属指状突起型、分叶型、浸润型和混合型,无一例为光滑型。病检多数为化生型脑膜瘤,部份或全部呈浸润性生长,瘤周水肿多属中度～重度。提示脑膜瘤全切除后复发除脑外因素外,还要考虑有脑内因素存在。     

脑膜瘤侵袭性机制的分子生物学研究进展

侵袭性为对肿瘤生物学行为的描述，主要指对周围组织的浸润、破坏、取代，常表示肿瘤的恶性行为。脑膜瘤的侵袭性主要指脑膜瘤细胞向周围组织如脑组织、硬脑膜、蛛网膜、大血管、颅骨、头皮等浸润。良性脑膜瘤如具有上述表现．即可诊断为侵袭性脑膜瘤。非典型性及恶性脑膜瘤的生物学行为更活跃，更易向周围组织浸润，侵袭性脑膜瘤的比例更高，一些学者甚至将不典型性及恶性脑膜瘤均归为侵袭性脑膜瘤。     

镰旁脑膜瘤的MRI影像学表现与病理意义

目的分析镰旁脑膜瘤的MRI征象与病理,以期提高其临床诊治水平。方法 73例镰旁脑膜瘤患者行MRI检查。将位置、大小、形状、边缘、水肿、信号、强化方式等影像特征、病理特点综合分析。结果除宽基底、脑膜尾征、假包膜等一般脑膜瘤的MRI表现外,还发现了如下不常见MRI表现:囊变2例,出血2例,钙化5例,颅骨受侵4例及肿块跨越征2例,病理可见相应表现。结论大脑镰旁脑膜瘤具有囊变、出血、钙化、颅骨受侵及肿块跨越征等不常见MRI征象。熟悉这些不典型表现与手术、病理综合分析,在肿瘤的诊断、鉴别诊断与治疗均具有很大价值。     

脑膜瘤MRI特征与其病理分级相关性分析

目的探讨脑膜瘤MRI特征与其病理分级相关性。方法回顾性分析2010年9月至2017年9月手术治疗的225例脑膜瘤的临床资料,根据术后病理结果分为WHOⅠ级(良性组),WHOⅡ、Ⅲ级(恶性组)。采用多因素Logistic回归分析分析不同性质脑膜瘤MRI特征。结果 225例脑膜瘤中,WHOⅠ级166例,Ⅱ级49例,Ⅲ级10例。多因素Logistic回归分析显示,肿瘤形态不规则、肿瘤强化不均匀、瘤周水肿严重是恶性脑膜瘤的独立预测因子,而脑膜尾征是良性脑膜瘤的独立预测因子。结论肿瘤形态、肿瘤强化、瘤周水肿、脑膜尾征等MRI征象与脑膜瘤分级存在相关性。     

脑膜瘤分子机制研究进展

脑膜瘤是最常见的中枢神经系统肿瘤之一,常发生在60~70岁,男女比例约为1：2。脑膜瘤占颅内原发肿瘤的24%~30%,其年发病率大约为每年13/100000人[1]。但随着CT和MRI的发展脑膜瘤的发病率呈逐年递增趋势,近期一个对人群的MRI研究显示无症状脑膜瘤在女性达到1.1%,人群平均发病率达0.9%[2]。大部分脑膜瘤呈良性,但有20%的脑膜瘤表现侵袭性行为[3]。WHO为了更好地预测不同脑膜瘤的临床特点,将脑膜瘤分为良性（WHOⅠ级）、非典型性（WHOⅡ级）和间变性（恶性）（WHOⅢ级）,     

Peritumoral cerebral edema in meningiomas: the role of the tumor-brain interface

We investigated the role of the tumor-brain interface in the production of peritumoral cerebral edema in meningiomas by analysing the size, shape, histological type and location of the tumor, and radiological and operative findings. Our results suggest that changes of the boundary zone between the tumor and the brain such as the disappearance of the subarachnoid space, cortical thinning or loss, and possibly partial loss of the arachnoid membrane are the most important factors in edema production, and that multiple other factors determine the morphological changes which occur at the tumor-brain interface.     

脑膜瘤和瘤周脑水肿的CT表现与肿瘤病理特征的关系

本文分析１３２例脑膜瘤的ＣＴ及病理学资料，探讨脑膜瘤和瘤周脑水肿的有关ＣＴ表现及其和组织学间的关系。发现大、中肿瘤呈不规则形、有低密度灶、非均一强化、无钙化灶者较易伴中、重度瘤周脑水肿，这些ＣＴ改变依间变型、非典型型和良性型顺序依次减少。显示肿瘤生长越活跃，越易出现以上ＣＴ改变并伴有明显瘤周水肿     

磁共振弥散张量成像在脑膜瘤诊断中的应用

目的探讨磁共振弥散张量成像在脑膜瘤诊断中的应用价值。方法选择60例脑膜瘤患者为研究对象,均接受颅脑MRI平扫及DTI检查,测量并比较肿瘤实质区、瘤周水肿区及瘤周白质区ADC值及FA值。结果1I级脑膜瘤中,上皮细胞型比例最高,为40%,其次为纤维型,比例为28%。各病理亚型ADC值比较,血管瘤型最低,为(7.55±1.17)×10-9 mm2/s,微囊型最高,为(14.24±2.43)×10-9 mm2/s。2良性脑膜瘤中,瘤周水肿ADC值最高,与肿瘤实质及瘤周白质比较,差异具有统计学意义(P0.05)。瘤周白质FA值最高,显著高于肿瘤实质及瘤周水肿,差异具有统计学意义(P0.05)。恶性脑膜瘤中,瘤周水肿ADC值最高,与肿瘤实质及瘤周白质比较,差异具有统计学意义(P0.05)。瘤周白质FA值最高,显著高于肿瘤实质及瘤周水肿,差异具有统计学意义(P0.05)。良恶性脑膜瘤比较,恶性脑膜瘤肿瘤实质ADC值及瘤周白质FA值均显著低于良性脑膜瘤,差异具有统计学意义(P0.05)。结论 DTI能够显示脑膜瘤实质及瘤周组织特征,可以为其诊断和治疗提高有价值的信息。     

Midkine expression in 52 human meningiomas:A correlation analysis

BACKGROUND: Several studies have shown that midkine directly participates in tumor cell growth and invasion, as well as the regulation of angiogenesis. OBJECTIVE: To investigate midkine expression in meningioma tissue in relation to angiogenesis, invasion, peritumoral edema, and clinicopathology. DESIGN, TIME AND SETTING: The present clinical, case-controlled, neuropathological study was performed at the Laboratory of Molecular Organism, People’s Hospital of Deyang City between May 2007 and April 2008. MATE...     

脑膜瘤继发癫癎的危险因素

目的分析脑膜瘤继发癫癎的危险因素。方法回顾性分析102例脑膜瘤病人的临床资料,采用二分类Logistic回归分析方法分析肿瘤的位置、直径、数目、质地、水肿、硬脑膜尾征、出血、肿瘤钙化、囊变、瘤-脑界限、累及动脉、累及静脉窦、相邻颅骨改变、合并脑积水、合并颅内其他影像学改变、是否复发以及病人的年龄、性别、病程、运动障碍、感觉障碍、精神异常、视觉障碍、语言障碍、脑神经功能障碍、锥体束征、高血压、贫血、高血糖、心电图异常等30项客观指标与继发癫癎的相关程度。结果入院时有明确癫癎发作史34例(33.33%)。Logistic分析显示:肿瘤位置、瘤周水肿、肿瘤钙化等3项指标的优势比分别为16.189、2.775、31.597(均P<0.05)。结论肿瘤邻近大脑半球皮质、瘤周水肿、肿瘤钙化是脑膜瘤继发癫癎的独立危险因素。     

Do aggressive imaging features correlate with advanced histopathological grade in meningiomas?

Atypical and malignant meningiomas are more likely to recur than benign meningiomas. We aimed to distinguish atypical and malignant meningiomas from benign meningiomas based on imaging findings. Between 2004 and 2007, a total of 75 patients with resected intracranial meningiomas were retrospectively reviewed. Histopathological grades were assigned as benign and atypical/malignant meningiomas according to the World Health Organization (WHO) classification. All patients received preoperative CT scans and MRI studies. Six aggressive imaging features were evaluated and compared between the two groups: (i) intratumoral cystic change; (ii) hyperostosis of the adjacent skull; (iii) bony destruction; (iv) extracranial tumor extension through the skull base foramina; (v) arterial encasement; and (vi) peritumoral brain edema. There were 59 benign and 16 atypical/malignant meningiomas. Only intratumoral cystic change and extracranial tumor extension through the skull base foramina were more prevalent in atypical/malignant meningiomas (p = 0.001). Hence, these two imaging features might be potential markers of atypical/malignant meningiomas.     

脑膜瘤的影像学特征与病理诊断的关系

目的探讨脑膜瘤的影像学特征与病理诊断之间的关系。方法对108例脑膜瘤的影像学资料及病理学资料进行了观察和分析。结果脑膜瘤的瘤周水肿、肿瘤形态、瘤-脑组织界面、肿瘤钙化及瘤内坏死或出血等影像学特征与脑膜瘤的良恶性有密切关系,并且合体型与纤维型脑膜瘤瘤周水肿率差异具有显著性,合体型与纤维型脑膜瘤中分叶形脑膜瘤所占比率差异有显著性。结论脑膜瘤的影像学与其病理诊断有密切关系,术前可根据肿瘤的影像学对其治疗和预后进行评估。     

Cytoplasmic iron deposition is associated with the expression of oxidative DNA damage marker in meningiomas

Angiomatous meningiomas are rare meningioma subtypes, which are characterized by abundant, well‐formed vessels. We encountered two cases of newly diagnosed angiomatous meningiomas exhibiting tumor cells with brown pigments, which were histochemically proven to be iron. In an attempt to understand its pathological significance, we assessed this unusual finding in representatives for each grade of meningiomas and immunoexpression of transferrin receptor (CD71) and the oxidative DNA damage marker, 8‐hydroxy‐2′‐deoxyguanosine (8‐OHdG). Iron deposition in the tumor cells was observed in 8/15 (53%) angiomatous meningioma cases, 2/6 (33%) microcystic meningiomas and 2/20 (10%) meningothelial meningiomas, which included clustered microvessels, but not in fibrous, atypical or anaplastic meningiomas (P = 0.001). Cytoplasmic CD71 expression was largely negative in angiomatous meningioma cases, but positive in meningothelial and high‐grade meningiomas, suggesting that the transferrin‐dependent iron transporter was involved in iron uptake in meningiomas. Nuclear expression of 8‐OHdG was observed in ≥50% of the tumor cells in all 15 cases of angiomatous meningioma and was associated with the presence of regressive histopathological findings, such as hyalinized vessels and cystic changes. In addition, the fraction of iron‐containing tumor cells was correlated to those expressing 8‐OHdG (P = 0.005). Our finding indicates that cytoplasmic iron deposition in tumor cells is characteristic of highly vascularized benign meningiomas and related to increased oxidative DNA damage markers.     

Peritumoral Brain Edema in Meningiomas : Correlation of Radiologic and Pathologic Features

Objective

The primary objective of this study was to perform a retrospective evaluation of the radiological and pathological features influencing the formation of peritumoral brain edema (PTBE) in meningiomas.

Methods

The magnetic resonance imaging (MRI) and pathology data for 86 patients with meningiomas, who underwent surgery at our institution between September 2003 and March 2009, were examined. We evaluated predictive factors related to peritumoral edema including gender, tumor volume, shape of tumor margin, presence of arachnoid plane, the signal intensity (SI) of the tumor in T2-weighted image (T2WI), the WHO histological classification (GI, GII/GIII) and the Ki-67 antigen labeling index (LI). The edema-tumor volume ratio was calculated as the edema index (EI) and was used to evaluate peritumoral edema.

Results

Gender (p=0.809) and pathological finding (p=0.084) were not statistically significantly associated with peritumoral edema by univariate analysis. Tumor volume was not correlated with the volume of peritumoral edema. By univariate analysis, three radiological features, and one pathological finding, were associated with PTBE of statistical significance: shape of tumor margin (p=0.001), presence of arachnoid plane (p=0.001), high SI of tumor in T2WI (p=0.001), and Ki-67 antigen LI (p=0.049). These results suggest that irregular tumor margins, hyperintensity in T2WI, absence of arachnoid plane on the MRI, and high Ki-67 LI can be important predictive factors that influence the formation of peritumoral edema in meningiomas. By multivariate analysis, only SI of the tumor in T2WI was statistically significantly associated with peritumoral edema.

Conclusion

Results of this study indicate that irregular tumor margin, hyperintensity in T2WI, absence of arachnoid plane on the MRI, and high Ki-67 LI may be important predictive factors influencing the formation of peritumoral edema in meningiomas.