摘要
背景与目的:四肢横纹肌肉瘤的影像学研究少见报道,本研究探讨四肢横纹肌肉瘤的MRI和CT影像学特征。方法:对9例四肢横纹肌肉瘤的MRI和CT资料进行回顾性分析。结果:8例进行了MRI检查的病变与肌肉相比,在T1WI都表现为等、低信号相混杂,以前者为主;在T2WI则均呈高信号与等和/或低信号相混杂的表现;注射造影剂后,病变都表现为显著强化,且明显不均。其中5例边界不清,周围可见水肿,3例边界清楚,周围未见水肿。3例进行了CT检查的病变与肌肉相比在平扫可见等、低密度成分,以前者为主,均未见钙化。其中1例边界清楚,2例边界不清;1例进行了增强扫描,表现为显著强化,且明显不均。全部9例患者的病变中8例可见坏死或囊变,均未见出血以及邻近骨骼破坏,但3例包绕邻近血管,1例形成静脉瘤栓。结论:MRI和CT检查若显示发生在四肢的软组织肿瘤,有坏死,强化明显且不均匀时,要在鉴别诊断中考虑横纹肌肉瘤,在没有出血、钙化及邻近骨破坏时更要考虑其可能性。
BACKGROUND ＆ OBJECTIVE： Imaging studies on rhabdomyosarcoma in the extremities have seldom been reported. This study was to explore the MRI and CT features of rhabdomyosarcoma in the extremities. METHODS ： MRI and CT data of 9 patients with rhabdomyosarcoma in the extremities were analyzed. RESULTS： Among the 8 cases that received MRI examination, as compared with muscle, all tumors showed mixed low and intermediate signal intensity on T1WI, with the later being predominant; all tumors showed intermingling areas of hyper-, iso-, and /or hypo- signal intensity on T2WI; after Gd-DTPA injection, all tumors showed strong and heterogeneous enhancement. Five of them showed ill-defined margin and surrounding edema, the other 3 were wellcircumscribed without conspicuous edema. Of the 3 cases that received CT examination, all tumors showed both low and intermediate density as compared with muscle on un-enhanced images, with the later being predominant; none of them showed calcification; 2 of them were ill-defined and the other 1 was well-circumscribed. The case that received contrastenhanced CT examination showed strong and heterogeneous enhancement. Among all 9 cases , 8 showed necrosis or cystic changes, none showed hemorrhage and invasion of adjacent bone, but 3 showed adjacent blood vessel encasement and 1 showed tumor thrombosis in the adjacent vein. CONCLUSION： When MRI or CT reveals a soft tissue mass in the extremity with necrosis and strong and heterogeneous enhancement, especially when hemorrhage, calcification and adjacent bone invasion is not present, rhabdomyosarcoma should be considered.
出处
《癌症》
SCIE
CAS
CSCD
北大核心
2007年第9期1001-1004,共4页
Chinese Journal of Cancer
关键词
横纹肌肉瘤
四肢
磁共振成像
体层摄影术
X线计算机
Rhabdomyosarcoma
Extremity
Magnetic resonance imaging
Tomography, X-ray computed
