实用放射学杂志
實用放射學雜誌
실용방사학잡지
Journal of Practical Radiology
2015年
10期
1593-1597
,共5页
黄云海%郭永梅%江新青%韦程纲
黃雲海%郭永梅%江新青%韋程綱
황운해%곽영매%강신청%위정강
多形性黄色星形细胞瘤%磁共振成像
多形性黃色星形細胞瘤%磁共振成像
다형성황색성형세포류%자공진성상
pleomorphic xanthoastrocytoma%magnetic resonance imaging
目的:探讨多形性黄色星形细胞瘤(PXA)的 MRI 特征及影像鉴别诊断价值。方法回顾性分析15例经手术病理证实为 PXA 的 MRI 图像,分析其临床病史、病变部位、大小、形态、信号、增强表现及邻近结构表现等影像表现,结合文献分析该病 MRI特征。结果15例病变均为幕上单发,其中颞叶9例(占60%);14例与软脑膜接触,1例与侧脑室壁接触。病变均为囊实性,囊实性部分比例不一,8例较大病变以囊性为主(53.3%),3例较小的病变以实性为主(20%),4例病变囊实性部分比例大致相当(26.7%)。肿瘤实性部分呈 T1 WI 中等或稍低信号、T2 WI 中等或稍高信号,增强扫描显著强化;囊液信号部分略高于脑脊液。7例可见囊壁或分隔线状强化;8例可见病变接触的软脑膜异常强化。结论PXA 的 MRI 特征为:颞叶多见、与软脑膜接触的脑内囊实性肿块,典型表现为“大囊伴附壁结节”或“多囊伴不规则偏心性实性结节”,实性部分显著强化。MRI 特征对 PXA 诊断及鉴别诊断有实用价值。
目的:探討多形性黃色星形細胞瘤(PXA)的 MRI 特徵及影像鑒彆診斷價值。方法迴顧性分析15例經手術病理證實為 PXA 的 MRI 圖像,分析其臨床病史、病變部位、大小、形態、信號、增彊錶現及鄰近結構錶現等影像錶現,結閤文獻分析該病 MRI特徵。結果15例病變均為幕上單髮,其中顳葉9例(佔60%);14例與軟腦膜接觸,1例與側腦室壁接觸。病變均為囊實性,囊實性部分比例不一,8例較大病變以囊性為主(53.3%),3例較小的病變以實性為主(20%),4例病變囊實性部分比例大緻相噹(26.7%)。腫瘤實性部分呈 T1 WI 中等或稍低信號、T2 WI 中等或稍高信號,增彊掃描顯著彊化;囊液信號部分略高于腦脊液。7例可見囊壁或分隔線狀彊化;8例可見病變接觸的軟腦膜異常彊化。結論PXA 的 MRI 特徵為:顳葉多見、與軟腦膜接觸的腦內囊實性腫塊,典型錶現為“大囊伴附壁結節”或“多囊伴不規則偏心性實性結節”,實性部分顯著彊化。MRI 特徵對 PXA 診斷及鑒彆診斷有實用價值。
목적:탐토다형성황색성형세포류(PXA)적 MRI 특정급영상감별진단개치。방법회고성분석15례경수술병리증실위 PXA 적 MRI 도상,분석기림상병사、병변부위、대소、형태、신호、증강표현급린근결구표현등영상표현,결합문헌분석해병 MRI특정。결과15례병변균위막상단발,기중섭협9례(점60%);14례여연뇌막접촉,1례여측뇌실벽접촉。병변균위낭실성,낭실성부분비례불일,8례교대병변이낭성위주(53.3%),3례교소적병변이실성위주(20%),4례병변낭실성부분비례대치상당(26.7%)。종류실성부분정 T1 WI 중등혹초저신호、T2 WI 중등혹초고신호,증강소묘현저강화;낭액신호부분략고우뇌척액。7례가견낭벽혹분격선상강화;8례가견병변접촉적연뇌막이상강화。결론PXA 적 MRI 특정위:섭협다견、여연뇌막접촉적뇌내낭실성종괴,전형표현위“대낭반부벽결절”혹“다낭반불규칙편심성실성결절”,실성부분현저강화。MRI 특정대 PXA 진단급감별진단유실용개치。
Objective To investigate the MRI features of pleomorphic xanthoastrocytoma (PXA).Methods 1 5 pathologically confirmed PXA cases were analyzed retrospectively.Clinical history and imaging features including location,size,shape,signal intensi-ty,enhancement and surrounding changes of those lesions were analyzed.Results All 1 5 cases were supratentorial and solitary le-sions,of which 9 lesions located in temporal lobe(60%).14 lesions contacted with the leptomeninges,and 1 lesion contacted with lat-eral ventricle wall.All lesions were solid-cystic,with different proportion of solid/cystic components.8 large lesions were predomi-nantly cystic(53.3%),3 small lesions were predominantly solid(20%),and 4 lesions had roughly equal cystic and solid proportions (26.7%).Solid components showed iso-intense or mild hypo-intense on T1 WI,iso-intense or mild hyper-intense on T2 WI,and signif-icant enhancement with contrast.Cyst fluid showed slightly hyper-intense in some cases.Cyst wall or septa enhancement was seen in 7 cases,and leptomeningeal enhancement was seen in 8 cases.Conclusion The MRI features of PXA are the characteristic of suprat-entorial solid-cystic lesions commonly seen in temporal lobe and contacting with leptomeninges.The typical features include “cyst with mural nodule”and “multiple cysts with irregular eccentric nodule”with significant enhancement of solid component and some cyst wall.MRI features of PXA is valuable in diagnosis and differential diagnosis of PXA.