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目的描述外周神经鞘瘤超声声像图特点,分析误诊原因。方法回顾性分析40例(46个病灶)病理学确诊的外周神经鞘瘤的超声声像图。结果肿瘤大小0.7~10.0 cm,平均(3.35±2.22)cm。40个实性,2个囊实混合性,4个囊性。多数肿块形态规整,边界清晰,可见包膜,低回声为主,少血供。21个(45.7%)肿瘤可见特征性鼠尾征。超声诊断符合率50.0%,误诊率34.8%。结论神经鞘瘤典型声像图鼠尾征显示率为45.7%,误诊原因主要是对非典型声像图和罕见部位肿瘤认识不足。
Objective To describe the characteristics of peripheral nerve sheath tumor ultrasonography and analyze the causes of misdiagnosis. Methods A retrospective analysis of 40 cases (46 lesions) pathologically diagnosed peripheral schwannoma ultrasound image. Results The tumor size ranged from 0.7 to 10.0 cm (average 3.35 ± 2.22 cm). 40 solid, 2 cystic mixed, 4 cystic. The majority of lumps form regular, clear boundary, showing the envelope, low echo-based, less blood supply. Twenty-one (45.7%) tumors showed characteristic tail signs. Ultrasound diagnosis coincidence rate of 50.0%, misdiagnosis rate of 34.8%. Conclusions The sphincter of the schwannoma shows 45.7% of the typical sonogram appearances. The causes of misdiagnosis are mainly the lack of understanding of the atypical echography and rare parts of tumors.