四肢肌内异位腱鞘囊肿的HRI诊断

目的探讨四肢肌内异位腱鞘囊肿的临床和MRI特点，为临床提供正确的影像学诊断。方法回顾性分析和总结53例经病理证实的四肢肌内异位腱鞘囊肿的临床和MRI资料。结果32例肌内异位腱鞘囊肿位于膝部，9例发生于肘部，7例发生于肩部，5例发生于踝部；45例位置深在，8例位置表浅；均呈长T1长T2信号，24例可见病灶缘“云絮”状或花边状高信号，43例可见病灶内低信号分隔影；增强扫描中，低信号分隔影及囊性部分、囊壁无强化。均未侵犯邻近骨骼。结论囊性病灶中出现均匀一致的窄飘带样无强化低信号分割带及具有光整无强化的囊壁是诊断四肢大关节附近肌内异位腱鞘囊肿比较可靠的征象。

MRI diagnosis of misplaced cyst of extremities in muscle

Objective To discuss the clinical and MR imaging feathures of misplaced cyst in extremitis muscle and to provide MR diagnosis for clinical. Methods Clinical and MR imaging data of fifty-three patients with histdogically confirmed misplaced cyst in musclc were retrospectively amalyzedamd studied. Results Thirty-two cysts occurrred in knee, nine in elbow, seven in shoulders, five in ankle.Fourty-five tumors were situated deeply and eight were superficial. All tumors showed long T1-weighted imaging and long T2-weighted imaging with having amorphous foci, linear of high signal intensity and owning low signal septa cine in tumors.Following the injection of Gd- DTPA, low signal lace showed slightly enhancement and cyst wall showed no enhancement. Adjacent bones were not been invased in fifty-three cases. Conclusion It is comparably accurant speciality that there are homogenous, narrow motive low signal septa with and absees smoothy cyst wall with no enhancement in the cyst tumors.