髋关节滑膜肉瘤的影像学表现

The imaging findings of hip synovial sarcoma

目的:分析髋关节滑膜肉瘤的影像学特点,提高诊断的准确性。方法:髋关节周围软组织滑膜肉瘤患者6例,其中4例行DR(digital radiography)拍片,1例行CT检查,6例患者均行MRI(underwent magnetic resonancei maging)检查。回顾分析相关影像学资料,总结其影像学特点。结果:DR表现为髋关节不规则骨质破坏。CT表现为髋关节周围密度不均匀软组织肿块,内中可见斑点状钙化影,邻近骨质不规则破坏。MRI表现为髋关节周围软组织肿块,边界不清;T1WI呈低信号,T2WI呈高、低混杂信号,脂肪抑制序列T2WI呈混杂高信号。结论:发现髋关节周围软组织肿块并邻近骨质不规则破坏,要考虑滑膜肉瘤的可能性。DR、CT、MRI三者相结合有助于髋关节滑膜肉瘤的诊断。

Objective：To analyse the imaging findings of hip synovial sarcoma in order to improve the accuracy in diagnosing.Methods：Among six patients with hip synovial sarcoma,4 underwent digital radiography（DR）,1 underwent CT and 6 underwent magnetic resonance imaging（MRI）.The imaging findings were analyzed retrospectively.Results：DR revealed irregular destruction of hip.The CT scans showed heterogeneous mass in adjacent hip with dotted calcification inside and adjacent bone destruction.The MRI scans demonstrated poorly-defined mass in adjacent hip.The lesion was showed hypointensity in T1 scan,inhomogenous signal inT2 scan and inhomogenous hyperintensity in T2 fat-saturated scan.Conclusion：Mass in adjacent hip with irregular bone destruction indicates the possible diagnosis of synovial sarcoma.DR,in addition to CT and MRI,is helpful in diagnosis of hip synovial sarcoma.