MRI对眼眶横纹肌肉瘤的诊断价值  

MRI Diagnosis of Orbital Rhabdomyosarcoma

作　　者：杨静[1] 张雪宁[1] 关祥祯[1] 

机构地区：[1]天津医科大学第二医院放射科,300211

出　　处：《临床放射学杂志》2010年第10期1324-1326,共3页Journal of Clinical Radiology

摘　　要：目的探讨MRI对眼眶横纹肌肉瘤(rhabdom yosarcoma,RMS)的诊断价值。资料与方法回顾性分析28例经手术病理证实的眼眶RMS患者的MRI表现。结果 28例中胚胎型21例,未作病理分型7例。均行MRI。病变位于肌锥内间隙23例,肌锥外间隙5例。11例原发,17例术后复发。肿瘤形态多较规则,边界尚清。21例病变较大,挤压视神经及眼球,造成视神经及眼球移位。T1WI上24例较眼外肌呈中等偏低信号,4例呈稍高信号。T2WI上信号强度略高于眼外肌,26例低于眶内脂肪。脂肪抑制序列上呈高信号。结论眼眶RMS在MRI上有一定的信号特点,而且MRI可以清楚地显示病变范围及其与眶内周围组织的关系,对于眼眶RMS的诊断有重要意义。Objective To investigate the value of MRI in the diagnosis of orbital rhabdomyosarcoma （ORMS）. Materials and Methods MRI manifestations of 28 cases with orbital rhabdomyosarcoma pathologically confirmed were retrospectively analyzed. Results 21 cases were embryoid rhabdomyosarcoma,and 7 cases were not performed by histopathologic type. All of the 28 cases were examined by plain magnetic resonance （MR） scan. 23 cases in the intraconal region,and 5 cases located in the extraconal region.11 cases were original,and 17 cases were reccurented.The shape of the majority of the lesions was regular. In 21 cases,the tumor compressed the eyeball and the optic nerve.On T1WI,24 cases appeared isointense to hypointense compare to the extraocular muscles,and 4 cases had hyperintense.On T2WI,the tumor appeared hyperintense compare to the extraocular muscles and hypointense compare to the orbital fat in 26 cases. On fat-suppression sequence,the lesion appeared hyperintense. Conclusion The orbital rhabdomyosarcoma has signal intensity characteristics on magnetic resonance imaging （MRI） and MR images can show clearly the relationship of the tumor and the surrounding orbital structure,and it is important in the diagnosis of the orbital rhabdomyosarcoma.

关 键 词：眼眶 横纹肌肉瘤 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R739.7[医药卫生—诊断学]