腹盆部滑膜肉瘤的CT、MRI表现与临床病理分析

CT and MRI of Synovial Sarcoma in Abdomen and Pelvis with Pathologic Correlation

目的 分析腹盆部部滑膜肉瘤(SS)的CT、MRI特征及临床病理特征,以提高对本病的诊断水平。方法 回顾性分析12例经手术病理证实的腹盆部SS的患者资料,总结其影像、病理及临床特征。结果 在12例SS中,有9例位于腹腔和腹膜后方,3例位于盆腔内;SS表现为实性软组织密度肿块,8例病灶的最大直径>5cm;形态为不规则分叶状的10例,圆形的2例;10例病灶密度/信号不均,病灶内发生囊变坏死;在接受MRI检查的7例病人中,T2WI“三重信号征”可见4例;增强扫描病灶明显强化,较大病灶强化不均匀;肿瘤转移征象出现3例。结论 腹盆部SS虽然相对少见,但恶性程度高,综合分析其CT及MRI特征表现,有助于提高其术前诊断正确率。

Objective To investigate the CT,MRI and clinicopathologic features of synovial sarcoma(SS) in abdomen and pelvis. Methods The data of 12 cases of pathologically proven SS were retrospectively reviewed.Their clinical,pathological,MSCT and MRI data was summarized. Results Among the 12 cases of synovial sarcoma,9 cases were located in abdomen,3 cases in pelvis. All of the tumors were solid soft-tissue masses. The tumor diameter of 8 cases was larger than 5cm. 2 cases were nearly round in shape and 10 cases were irregularly shaped. Lesions were heterogeneous in density/signal in 10 cases. In the 7patients underwent MRI scan, " triple signal intensity sign" was visualized in 4 of them. All lesions were heterogeneously enhanced. Remote metastases occurred in 3 patients. Conclusion Synovial sarcoma has certain distinctive imaging features. CT and MRI are helpful for diagnosis.