| 庄雪婷,陈杰云,林晓莹,黄日升.滑膜肉瘤CT及MRI表现[J].中国医学影像技术,2021,37(3):446~449 |
| 滑膜肉瘤CT及MRI表现 |
| CT and MRI manifestations of synovial sarcoma |
| 投稿时间：2020-02-26 修订日期：2020-08-18 |
| DOI：10.13929/j.issn.1003-3289.2021.03.031 |
| 中文关键词: 肉瘤,滑膜 体层摄影术,X线计算机 磁共振成像 |
| 英文关键词:sarcoma, synovial tomography, X-ray computed magnetic resonance imaging |
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| 中文摘要: |
| 目的 观察滑膜肉瘤（SS）的CT及MRI表现。方法 回顾性分析20例SS患者的影像学及病理学资料，11例接受CT平扫，其中8例接受增强检查；14例接受MRI平扫，其中9例接受增强检查，分析其影像学表现。结果 20例SS中，12例发生于四肢，8例发生于其他部位；病灶最大径2.1~16.0 cm，其中12例>5 cm。CT平扫病灶表现为等或稍低密度，8例密度不均匀，3例密度均匀；3例出现边缘性钙化，2例邻近骨质破坏；增强后2例呈渐进性明显强化，6例为不均匀渐进性中度或明显强化。3例MR T1WI呈均匀低或稍低信号，T2WI呈均匀高或稍高信号；11例MRI信号不均匀，其中8例伴出血呈明显高信号，7例出现"三重"信号，8例瘤内见低信号分隔，6例呈"铺路石"样改变；5例病灶周围轻度水肿。增强后2例均匀明显强化、2例不均匀中度强化、5例不均匀明显强化，其中4例见"筋膜尾征"。结论 SS的CT和MRI表现具有一定特征性，有助于术前诊断。 |
| 英文摘要: |
| Objective To observe CT and MRI manifestations of synovial sarcoma (SS). Methods Imaging and pathological data of 20 SS patients were retrospectively analyzed, including 11 underwent plain CT, 8 underwent both plain and enhanced CT, 14 underwent plain MRI and 9 underwent both plain and enhanced MRI, and the imaging manifestations were analyzed. Results Lesions located in extremities in 12 cases, in the other parts in 8 cases. The maximum diameter of lesions was 2.1-16.0 cm, of 12 cases were larger than 5 cm. The lesions showed equal or slightly lower density on plain CT, with uneven density in 8 cases and uniform in 3 cases. Peripheral calcifications were detected in 3 cases, while invasion of adjacent bones were observed in 2 cases. SS showed progressive and obvious enhancement in 2 cases, uneven and moderate or obvious enhancement in 6 cases. On plain MRI, SS in 3 cases present as hypointense or slight hypointense signals on T1WI and hyper-intense or slight hyper-intense signals on T2WI, while in 11 cases present as heterogeneous intense signals. Hemorrhage and obvious hyperintensity were found in 8 cases, "triple" sign in 7 cases, low signal separation in tumor in 8 cases and "cobble" changes in 6 cases, while mild edema around lesions were noticed in 5 cases. Enhanced MRI showed uniform and obvious enhancement in 2 cases, uneven moderate enhancement in 2 cases and uneven remarkable enhancement in 5 cases, lesions with "fascial tail sign" were seen in 4 cases. Conclusion CT and MRI manifestations of SS had certain characteristics, which were helpful for preoperative diagnosis of SS. |
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