肌内黏液瘤超声影像特征

目的观察并分析肌内黏液瘤的超声表现特征。方法回顾性分析8例经手术病理证实的肌内黏液瘤的二维及CDFI超声表现特征,并进行文献复习。结果 8例肌内黏液瘤中,5例位于下肢肌肉,2例位于上肢肌肉,1例位于腰大肌;8例均表现为边界清楚,形态规则的肿块,后方回声增强,内部为不均匀弱回声,6例肿块内可见片状无回声区。8例肿块周边均有"亮环征",7例可见"亮帽征"。CDFI显示6例肿块内无血流,2例部分区域内见点线状血流信号。结论肌内黏液瘤好发于四肢骨骼肌,超声表现特征为边界清楚,形态规则,后方回声增强,内部为不均匀弱回声、可见片状无回声区,周边可见"亮环征"及"亮帽征",内部血流多不丰富。

Ultrasonic manifestations of intramuscular myxoma

Objective To observe and analyze the ultrasonic manifestations of intramuscular myxomas (IM). Methods Two-dimension ultrasound and CDFI manifestation of 8 patients with IM confirmed by pathology were analyzed retrospectively and related literatures were reviewed. Results Among 8 patients, masses located at lower limbs muscle in 5 patients, at upper limbs muscles in 2 patients, and at psoas major muscle in 1 patient. In the 8 cases of IM, masses presented clear boundary, regular morphology, enhancing posterior echoes and inhomogeneous weak internal echoes, lamellar echoless areas was in 6 cases. "bright rim signs" could be seen around the masses of all 8 cases, and "bright cap signs" could be seen around the masses of 7 cases. Masses showed no blood flow signal in 6 cases, and linear blood flow signal in 2 cases. Conclusion IM tends to be loated at limb skeletal muscles. Its ultrasonic manifestations includes clear boundary, oval shape, enhancing posterior echo, inhomogeneous weak internal echoes, and lamellar echoless area or not. "bright rim sign" and "bright cap sign" can also be seen around masses, and masses usually have poor blood flow signals.