膝关节滑膜血管瘤的MRI诊断(附7例报告)

目的探讨MRI对膝关节滑膜血管瘤的诊断价值。方法我院2025例膝关节MRI检查患者中经病理和临床检查证实的膝关节滑膜血管瘤7例(男2例,女5例),平均年龄25.1岁。7例术前均摄有X线平片。分析其MRI表现。结果病变仅位于髌下脂肪垫的4例,占57%,其余3例为髌下脂肪垫和髌上囊均被累及。MRI的信号改变分为3种类型:(1)T1、T2均呈低信号改变,病灶呈结节状2例;(2)T1等、低信号,T2高、低信号2例;(3)T1低信号为主,混有等信号2例;T2结节状或条状低信号、高信号混杂3例。病理组织成分不同,MRI表现各异。结论MRI表现与血管瘤的组织成分有关。

MRI Diagnosis of Synovial Hemangioma of the Knee (A Report of 7 Cases)

Objective To probe the diagnostic value of MRI in synovial hemangioma of the knee.Methods Seven patients(2 male,5 female,age ranged from 8 to 58 years with mean age 25.1 years) selected from 2025 cases with MRI examination of knee,which were proved to be intra-articular hemangiomas histologically or clinically.All of the patients had plain film before MRI examination.MR findings of synovial hemangioma of knee were analysed ultrasound.Results Four hemangiomas occurred in infrapatellar bursa,others 3 cases in both infrapatellar and suprapatellar bursa were involved.MR signal intensity of hemangiomas appeared three types:(1)nodular hypointensity on both T_1WI and T_2WI in 2 cases;(2)iso-hypointensity on T_1WI and hyper-hypointensity on T_2WI in 2 cases;(3)hypointensity mixed with isontensity on T_1WI and nodular of linear mixedintensity on T_2WI in 3 cases.The difference of synovial hemangioma of knee in histologic elements,the MR findings were different.Conclusion MRI features of synovial hemangioma are correlated with pathology histologic elements.