目的探讨滑膜肉瘤的影像学特征,提高诊断的准确性。方法回顾性分析病理确诊的13例滑膜肉瘤的临床及影像学资料。结果①大部分滑膜肉瘤邻近关节,尤其下肢大关节。②X线平片上多表现为直径>5cm的中等密度的肿块,部分有钙化。③CT上多表现为略低于肌肉密度的肿块,边界清楚或不清楚,内部密度欠均匀。④磁共振T2WI/STIR像肿瘤内多呈稍高信号的“卵石”状结节,其间有低信号间隔,增强后结节不强化或轻度强化,间隔明显强化。结论滑膜肉瘤的一些影像学特点,尤其MRI特点对其诊断有较强的参考价值。 Objective To investigate the imaging features of synovial sarcoma and improve the diagnostic accuracy. Methods Retrospective analysis of 13 cases of pathologically confirmed synovial sarcoma clinical and imaging data. Results ① Most synovial sarcomas were adjacent to the joints, especially the lower extremities. ② X-ray film on the performance of more than 5cm in diameter medium-density mass, some calcification. ③ CT performance of slightly less than the density of the mass of the tumor, the border is clear or unclear, the internal density less uniform. Magnetic resonance T2WI / STIR, like “pebble” nodules with slightly higher signal in tumors, had a low signal interval between them. The nodules were not enhanced or mildly enhanced, and the interval was obviously enhanced. Conclusions Some synovial sarcoma imaging features, especially MRI features have a strong reference value for its diagnosis.