四肢软组织海绵状血管瘤的MRI分析

目的：分析四肢软组织海绵状血管瘤的MRI表现特征,旨在提高其诊治水平。方法：回顾性分析19例经病理证实的四肢软组织海绵状血管瘤的MRI表现。结果：发病部位：上肢5例,下肢14例;MRI表现主要分为三型,①局限团块型11例,6例位于肌肉间隙,5例位于皮下疏松组织内,T1WI表现为中等或略高信号,T2WI8例出现典型团块周围的＂铁环征＂,3例明亮高信号内见条形低信号分隔类似囊性病变表现;②弥漫蔓藤型6例,均位于皮肤表层或皮下疏松组织内,表现为弥散分布的迂曲的蔓藤状,T1WI呈等略高信号,T2WI呈明亮高信号,一般无血管流空现象;③混合型2例,均位于皮下疏松组织内,同时具有上述两种类型的影像表现;各型增强扫描均有明显强化。结论：四肢软组织海绵状血管瘤的MRI表现有一定的特征性,MRI对临床定位、诊断及治疗方案的选择有重要价值。

Analysis of MRI features of soft tissue cavernous hemangioma

Objective：To analyze the features of magnetic resonance imaging （MRI） in soft tissue cavernous hemangioma （STCH） so as to improve the diagnostic levels. Methods：The MRI appearances of the STCH in 19 cases were reviewed in this work. All cases were confirmed by operation and pathology. Results：19 cases included five cases in upper limb and 14 cases in lower limb. Of the 19 cases,11 cases were cavernous clumps,six cases were pampiniform clumps,and the other two were mixed clumps. In the 11 case of cavernous clumps,there were six cases in intramuscular and five cases in rarefaction tissue. In the 11 cases,there were eight cases with low signal ring of the border and three cases like the cystic lesions. The six pampiniform clumps were all located in the rarefaction tissue,which appeared tortuous dilation blood vessel without vascular flow void phenomenon. Both of the mixed clumps were located in the rarefaction tissue,which showed both the cavernous and pampiniform clumps. All of the 19 tumors showed moderate or slightly higher signal on T1WI,high signal on T2WI,and presented evidently enhancement after injection of contrast-medium. Conclusion：There are some characters of MRI in STCH and MRI examination is of great importance in determining the position,the nature of cavernous hemangioma as well as the choice of treatment.