软组织滑膜肉瘤的CT和MRI诊断

目的：探讨软组织滑膜肉瘤的影像学表现。方法：回顾性分析17例经手术病理证实的软组织滑膜肉瘤患者的临床及影像学资料,分析其影像学征象。结果：大部分滑膜肉瘤影像表现为邻近关节边界较为清楚的团块状或分叶状软组织肿块,肿瘤体积一般较大（〉5 cm,88%）。CT平扫可见肿瘤大部分密度与肌肉密度相似,其内可见范围不等的低密度区,1例见团块状钙化,2例见斑点状钙化,主要位于肿块的周边。较大的肿瘤（〉5 cm）在MR T1WI上与肌肉信号相比呈不均匀等信号或稍高信号,在T2WI上表现为以高信号或稍高信号为主的混杂信号,5例肿块内可见低信号分隔;较小的肿瘤（〈5 cm）在各序列上均表现出信号的均匀性;增强扫描大部分肿瘤呈明显不均匀强化。结论：软组织滑膜肉瘤的影像学表现具有一定的特征性,CT和MRI综合评价有助于提高滑膜肉瘤的诊断准确性。

Synovial sarcoma of soft tissues:a CT and MRI study

Objective:To discuss the imaging features of synovial sarcoma of soft tissues.Methods:Seventeen cases of synovial sarcoma of soft tissues proved by pathology were analyzed retrospectively.Results:Most lesions tended to be large(>5cm,88%) and located in the extremities close to joints and were relatively well defined in relation to surrounding tissues,with rounded or lobulated margins.On CT imaging the lesion appeared as a soft tissue mass similar to muscles in density with 3 cases demonstrating peripheral p...