Hemangiopericytoma of the Greater Omentum

A 41-year-old Chinese woman was admitted to our hospital with epigastric pain. Computed tomography detected a heterogeneous enhancement tumor fed by the left gastroepiploic artery in the left lower quadrant and cholelithiasis. Excision of the tumor in the greater omentum and cholecystectomy were performed laparoscopically. Histological findings confirmed a diagnosis of hemangiopericytoma with low-grade malignancy. To our knowledge, hemangiopericytoma of the greater omentum is very rare, and only 12 cases were reported in English literature. We report a case of hemangiopericytoma arising in the greater omentum and review the literature.     

Preoperative embolization in surgical treatment of a primary hemangiopericytoma of the rib: a case report

Primary hemangiopericytoma of the rib is extremely rare and only a few cases have been reported. A 62-yr-old man presented with an aching chest pain and dyspnea. Thoracic computed tomography revealed a homogenous mass expanding the right seventh rib. A diagnosis of hemangiopericytoma was established by percutaneous needle biopsy. Preoperative embolization of the feeding vessels of the tumor was performed in order to prevent perioperative bleeding. There was no significant bleeding during the surgery, where complete resection of the tumor with 7th to 9th ribs with a surgical margin of 5 cm was performed. Postoperative course was uneventful and there has been no recurrence for thirteen months. To our knowledge, there has been no report to apply a preoperative embolization of a primary hemangiopericytoma of the rib.     

Solitary fibrous tumor of central nervous system masquerading as meninigioma: Report of a rare case

IntroductionSolitary fibrous tumor (SFT) is a rare neoplasm of mesenchymal origin that occurs most often in the visceral pleura. It rarely occurs in the central nervous system (CNS). If they occur intracranially, they are extra-axially located and develop from the meninges.Case ReportHerein, we present a case of SFT in a 45 years old female. MR imaging showed isointense to hypointense signal intensity, and marked enhancement. Microscopically, the tumors showed characteristic “patternless-pattern” architecture. Elongated tumor cells formed fascicles alternating with hypocellular densely collagenous stroma. Immunohistochemistry for STAT6, CD34, BCL2 and CD99 favours the definitive diagnosis of SFT.ConclusionIn general, complete surgical resection may offer the best chance of a favourable clinical outcome. Their biological features remain largely unknown. Hence, the clinical management and prognosis is often challenging due to the lack of comprehensive data.     

鞍区血管外皮细胞瘤的诊断及显微手术治疗

目的探讨鞍区血管外皮细胞瘤(hemangiopericytomas,HPC)的临床诊断特点及显微手术的治疗效果。方法对2001年3月~2014年12月6例术后病理证实为鞍区HPC的临床表现、神经影像学、治疗和预后等进行回顾性分析。结果 4例采用额颞入路,1例额眶颧入路,1例额外侧入路。肿瘤全切除3例,近全切除1例,大部分切除2例。术中出血量600~2100 ml,平均1200 ml。6例术后病理证实为HPC,均接受普通放疗。术后并发无菌性脑膜炎2例,抗生素及腰穿置管后治愈。动眼神经麻痹2例,对侧肢体偏瘫1例,神经康复理疗后改善。6例随访6~29个月,平均14.8月,无神经系统转移及死亡。结论鞍区HPC临床少见,误诊率高。肿瘤易复发,最有效的治疗方法是全切除肿瘤。     

中枢神经系统复发血管外皮细胞瘤的预后相关因素分析

目的 探讨中枢神经系统复发血管外皮细胞瘤(HPC)的预后相关因素.方法 回顾性分析首都医科大学附属北京天坛医院46例中枢神经系统复发HPC患者的病例特点及治疗情况,对影响其预后的相关因素应用Kaplan-Meier法和Cox回归分析进行统计学验证.结果 单因素分析显示与预后相关的因素包括肿瘤复发年龄、初次复发至二次复发的间隔、肿瘤边界和辅助放疗.Cox多因素分析显示肿瘤全切术后辅助放疗是有益于预后的独立因素(P＜0.05).结论 结合影响复发HPC的预后相关因素,加深对该疾病的认识,合理安排临床诊疗过程,提高患者的预后.     

颈段椎管内血管周细胞瘤1例

患者男,52岁,主因"双上肢麻木、力弱伴枕颈痛2个月,排尿障碍1月余"就诊,曾于3年前接受椎间盘手术。查体:左上肢肌力4级,对指笨拙;右上肢肌力3级,远端差;左下肢肌张力痉挛性增高;右下肢肌力4级。巴宾斯基征阳性;左上肢、右侧肢体浅感觉减退;左侧位置觉丧失。颈部MRI:于C2～3椎体     

中枢神经系统血管周细胞瘤诊治分析

目的：探讨中枢神经系统血管周细胞瘤的临床特点及其治疗方法。方法回顾分析14例中枢神经系统血管周细胞瘤患者的临床资料,随访5～100个月,并进行文献复习。结果14例患者均行手术,术后病理明确诊断。肿瘤全切除8例,大部切除3例,部分切除3例。肿瘤复发7例（50％,4例为全切除,1例大部切除,2例为部分切除,术后均未曾放疗）,中位复发时间39个月,全切术后中位复发时间41．5个月,未全切除中位复发时间17个月。复发后再次手术及术后放疗仍可获得较长时间生存。结论血管周细胞瘤诊断依赖于病理,目前手术及术后放疗是较好的治疗办法,手术切除的完整性尤为重要。     

颅内血管外皮细胞瘤的MRI与病理结果(附13例报告)

目的 探讨颅内血管外皮细胞瘤的MRI表现，并与病理对照，分析误诊原因。资料与方法搜集术前MRI诊断脑膜瘤，而手术证实为血管外皮细胞瘤13例，所有病例均行MR平扫及增强扫描。结果 13例MRI示肿瘤位于颅内脑外，MR平扫TlWI呈高低不均信号9例，等信号4例；T2WI呈不均匀高信号9例，等信号4例；增强扫描11例呈不均匀强化。术后病理证实肿瘤来源于脑膜间质的血管外皮细胞。结论 颅内血管外皮细胞瘤MRI表现与脑膜瘤相似，但前者往往出现分叶征，有丰富的血管，肿瘤易出血、坏死致信号不均匀，无钙化及局部骨质反应性增生和有溶骨性破坏等特点，据此可资鉴别。病理免疫组织化学可确定肿瘤的起源。     

颅内血管周细胞瘤的影像学诊断

目的 探讨颅内血管周细胞瘤（HPC）的影像学特征,以提高对该病的诊断水平。方法 回顾性分析经手术病理证实的26例颅内HPC的影像学及病理资料。结果 26例患者中,所有病灶位于颅内脑外,位于颅底7例、矢状窦旁5例、大脑镰旁4例、小脑幕旁3例、大脑凸面7例。病灶呈分叶状15例,呈不规则形11例。CT平扫呈等密度或稍高密度7例,稍低密度3例;颅骨破坏4例,瘤内钙化1例;增强扫描病灶呈均匀明显强化4例,不均匀强化6例。MR平扫病灶T1WI呈等、高、低混杂信号20例,稍低信号3例,稍高信号3例;T2WI呈高、低混杂信号18例,等、低混杂信号5例,等信号3例;T1WI及T2WI显示坏死囊变21例;有血管流空18例,出血7例,4例肿瘤邻近颅骨破坏;增强扫描22例呈不均匀显著强化,4例呈均匀显著强化,17例瘤周水肿明显。镜检示瘤细胞弥漫分布,间质有大量裂隙状血管;免疫组化结果显示26例Vim、CD34、CD99阳性,CD31、EMA、CK、Syn及Bcl-2均阴性。结论 HPC的影像学表现具有一定特征性,但需与脑膜瘤鉴别,要注意分析其恶性征象,以提高术前诊断的正确率。