右侧桥小脑角区脉络丛乳头状瘤一例

患者女,50岁.因1年前无明显诱因出现双眼视力下降,伴流泪,伴头晕,未行特殊治疗,症状逐渐加重入院.体格检查:体温36.5℃,脉搏75次/min,呼吸18次/min,血压119/80mmHg(1 mmHg=0.133 kPa).神志清楚,双侧瞳孔等大等圆,瞳孔直径(D)=3 mm,对光放射敏感,双眼视盘充血、水肿,边界...     

桥小脑角区非典型性脉络丛乳头状瘤1例

患者男,52岁。头痛、头晕3月余。查体：走路不稳,共济失调,听力下降。3月前患者无明显诱因出现头晕,走路不稳,加重20天。血压130/90mmHg,四肢肌张力3级。MRI表现：右侧桥小脑角区可见浅分叶状等或稍长T1等或稍长T2信号影,其后方见类椭圆形长T1长T2信号（图1,2）,边界较清楚,周围见少许长T1长T2水肿信号影。增强后实性成分明显强化,囊性成分未见强化（图3）。     

桥小脑角脉络丛乳头状瘤一例

患者女 ,34岁。头痛 6个月 ,双目视力下降、左耳鸣、面部麻木 11个月。体检 :双目视力下降 ,双视神经乳头水肿 ,可见火焰状出血及白色分泌物。角膜反射迟钝。左耳听力较右侧稍差。闭目站立征阳性 ,站立不协调。左侧第Ⅱ、Ⅴ、Ⅷ颅神经麻痹。ＣＴ(外院 ) :左侧桥小脑角 (ＣＰＡ)见边界清楚的混杂密度占位 ,第 4脑室受压移位。幕上脑室轻度扩张。增强后病变呈均一强化 ,约 3 97ｃｍ× 3 49ｃｍ大小 ,其后方可见弧形带状低密度未强化区。岩骨无破坏 ,内听道无扩大。ＣＴ诊断 :左ＣＰＡ脑膜瘤 ,听神经瘤待除外。ＭＲＩ:左侧ＣＰＡ见约 4ｃｍ× 5…     

桥小脑角脉络丛乳头状癌一例

患者女,27岁.耳鸣、头晕2个月,加重伴呕吐1个月,于2009年5月10日就诊.体检:耳鸣呈阵发性,双眼视物模糊并复视,双眼水平震颤,左角膜反射消失,左额纹变浅,左上睑不能完全闭合,左面部触觉、痛觉迟钝,左耳听力差,肢体平衡试验阳性.其他检查无异常.     

右侧桥小脑角区胶质母细胞瘤1例

患者男,54岁。因间断性头晕、头痛1年,近15 d 症状明显加重伴右侧视力下降,外院 MR检查右侧桥小脑角区占位入院。
　　CT检查：右侧桥小脑角区团块状不均匀密度影伴斑片状出血灶(图1,2),边界不清,大小约5.2 cm×4.4 cm,CT值26~60 HU。MRI检查：平扫(外院)示右侧桥小脑角区不规则团块状异常信号影,信号不均匀,其内可见囊变坏死区；增强扫描病灶呈环状不规则强化信号,其内可见无强化区,四脑室及脑干受压,小脑扁桃体下移(图3~5)。     

桥小脑角区脉络丛乳头状瘤影像学表现(附5例分析)

目的 探讨桥小脑角区(cerebellopontine angle,CPA)脉络丛乳头状瘤(choroid plexus papilloma,CPP)的影像学特点.资料与方法 搜集5例经手术病理证实的桥小脑角区脉络丛乳头状瘤(CPA-CPP),回顾性分析其CT及MRI表现,总结其影像学特点.结果 5例病灶均为单侧,边界清晰,呈分叶状.CT上呈与周围脑实质等密度或略低密度改变,2例病灶内可见钙化.MR T1 WI上病灶呈低信号或等信号,T2WI上呈混杂信号,4例病灶可见特征性血管流空信号.增强扫描所有病灶均呈明显较均匀强化.病灶不伴瘤周水肿,可由占位效应引起梗阻性脑积水.结论 CPA发生的CPP与其他部位发生的CPP影像学特征类似.发现分叶状形态、明显强化、血管流空信号对诊断有一定帮助.影像学检查对于CPA-CPP诊断具有重要价值.     

脉络丛乳头状瘤1例

患者男,15岁。头痛,头晕半年余,近来加重,伴恶心,呕吐,视物不清,以右眼为著;PE:全身浮肿,头大,双侧瞳孔对光反射消失。CT表现;右侧侧脑室室间孔处见一约3·8cm×3·2cm×3·0cm类圆形等密度影,其内见底密度区(图1),边界光整,脑室系统明显扩大,颅缝增宽。增强明显强化,不均匀(图2)。手术及病理:肿瘤呈球形,大小约4·0cm×3·5cm×3·3cm,与侧脑室壁相连,表面粗造,呈乳头状,质硬而脆,易图1右侧侧脑室室间孔处见类圆形等密度影,其内见低密度区图2明显强化,不均匀碎,内见坏死组织。镜下:似正常脉胳丛乳头密集,上皮细胞增生活跃,排列密集。病理…     

桥小脑角区局部匍匐样生长室管膜瘤1例

<正>患者女,53岁。半月前无明显诱因头痛头晕,呈阵发性,伴双耳听力下降,渐加重。体检及实验室检查无明显异常。MRI表现:左侧桥小脑角区不规则肿块灶,病灶向上蔓延至同侧桥小脑角池、桥前池,向下蔓延至延髓前方,呈长T₁稍长T₂信号为主,其内见多发大小不等长T₁长T₂信号囊变区,病灶周围未见明显水肿。增强后实性部分明显不均匀强化,囊性部分无明显强化,病灶大小约3.1 cm×2.9 cm,     

MRI of cerebellopontine angle choroid plexus papilloma

We present a cerebellopontine angle choroid plexus papilloma that originated from the tuft of choroid plexus of the fourth ventricle protruding from the foramen of Luschka. MRI and CT did not establish the diagnosis, but the tumor was shown histopathologically to be a choroid plexus papilloma. Distinct features of the tumor on MRI are described and the differential diagnosis of other cerebellopontine angle tumors is discussed.     

A case report of atypical choroid plexus papilloma in the cervicothoracic spinal cord

Choroid plexus papillomas (CPPs) are uncommon, benign intracranial tumors that can occur in both children and adults. In adults, CPPs are typically identified in the fourth ventricle, whereas in children, they most commonly occur in the lateral ventricle. CPPs that arise from the extraventricular system are extremely rare and difficult to diagnose. We report a case of extraventricular, atypical CPP located in the cervicothoracic spinal cord of a 2-year-old girl.     

CT scanning for papilloma of choroid plexus

Summary A case of choroid plexus papilloma is presented which was extensively investigated. The location of the pedicle of this tumor was not demonstrated by conventional CT, ventriculography or ventriculoscopy.Coronal CT sections, however, clearly showed the pedicle and its location. Dilatation of the cisterns and sulci suggested that there was overproduction of cerebrospinal fluid.     

囊性改变为主的脉络丛乳头状瘤MRI表现

脉络丛乳头状瘤(choroid plexus papilloma,CPP)是起源于脑室的良性肿瘤,发病率较低,其典型的影像表现术前诊断不难,但是不典型的表现诊断仍困难.现收集3例以囊性改变为主的CPP影像资料,提高对该肿瘤不典型表现的认识.     

非典型性脉络丛乳头状瘤的MRI表现

目的探讨非典型性脉络丛乳头状瘤(atypical choroid plexus papilloma,ACPP)的MRI表现。方法收集经我院病理证实的4例非典型性脉络丛乳头状瘤,结合相关文献分析其MRI表现。结果 4例非典型性脉络丛乳头状瘤中,2例位于右侧脑室,均呈囊实性改变,实性部分T1WI呈稍低信号,T2WI呈稍高信号,增强后实性肿块、囊壁及分隔呈明显强化;1例位于第四脑室,1例位于右侧桥小脑角区,均呈实性肿块,T1WI呈稍低信号,T2WI呈稍高信号,增强后肿块呈中-重度均匀强化。结论位于侧脑室的ACPP具有一定的特点,MRI能够显示ACPP与脉络丛的关系,有利于术前诊断。