腱鞘巨细胞瘤MRI表现及信号特点

The MRI presentations and signal characteristics of tendon sheath giant cell tumor

目的:总结腱鞘巨细胞瘤的MRI表现及信号特点。方法:回顾性分析14例经手术和病理证实的腱鞘巨细胞瘤患者的病例资料,其中2例为术后复发。所有病例均行MRI平扫,其中1例行增强扫描,分析所有病例的MRI信号特征及发病部位。结果:14例中局限性12例,弥漫性2例,肿瘤信号与正常骨骼肌对比,11例T1WI上以等信号为主,3例以稍低信号为主;T2WI信号呈多样性,8例以稍高信号为主,2例呈稍低信号,2例呈等信号,2例呈混杂信号。14例可见T1WI及T2WI上均呈低信号病灶。结论:腱鞘巨细胞瘤多发生于手、足等肢体远端,且以局限型多见。MRI信号呈多样性,但T1WI及T2WI双向低信号为其特征性表现,且其对诊断、指导临床治疗和随访具有重要价值。

Objective：To analyze the MRI presentations and signal characteristics of tendon sheath giant cell tumors.Methods：MR features of 14 cases with surgically and pathologically proven tendon sheath giant cell tumor were evaluated retrospectively（including 2 postoperative recurrence patients）.MR plain scan was employed in all cases and only one patient received contrast enhancement scan.Results：There were 12 cases of focal lesions and 2 cases of diffusion lesions in the group.MR signal features included：Isointensity on T1WI（n=11）,slight hypointensity on T1WI（n=3）,slight hyperintensity on T2WI（n=8）,slight hypointensity on T2WI（n=2）,isointensity on T2WI（n=2）,mixed intensity on T2WI（n=2）.Conclusion：Most of tendon sheath giant cell tumor cases occured in distal limbs such as hands or feet.Focal type was more common.MR features of tendon sheath giant cell tumor were variable and both low signals on T1WI and T2WI sequence were characteristic.MR is important for tendon sheath giant cell tumors diagnosis.