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目的探讨神经鞘瘤内靶征的超声诊断价值及形成原因。方法回顾性分析42例浅表神经鞘瘤患者的超声及病理表现,并与50例浅表软组织肿物患者的超声特征进行对照分析,采用ROC曲线评价各项超声特征诊断神经鞘瘤的价值。结果鼠尾征、靶征在神经鞘瘤组中的显示率要高于对照组,差异有统计学意义(P<0.001)。鼠尾征、靶征及两者联合诊断神经鞘瘤的ROC曲线下面积分别为0.727、0.735、0.861,鼠尾征与靶征曲线下面积比较,差异无统计学意义(Z=0.449,P=0.653),鼠尾征、靶征分别与两者联合进行曲线下面积比较,差异均有统计学意义(P<0.001)。结论靶征有助于神经鞘瘤的超声诊断,其形成与神经鞘瘤特有的组织构成有关。
Objective To investigate the diagnostic value and cause of ultrasound in the target of Schwannoma. Methods The ultrasonographic and pathological findings of 42 patients with superficial schwannoma were retrospectively analyzed. The ultrasonographic features of 50 patients with superficial soft tissue mass were analyzed. The diagnostic value of ultrasound features of schwannoma was evaluated by ROC curve. Results The rat tail signs and target signs in the schwannoma group were higher than those in the control group, the difference was statistically significant (P <0.001). The area under the ROC curve of rat tail signs, target signs and the combined diagnosis of schwannoma was 0.727, 0.735 and 0.861, respectively. There was no significant difference in the area under the curve between tail tail sign and target sign (Z = 0.449, P = 0.653). There was significant difference (P <0.001) between the rat tail sign and target sign in the area under the curve. Conclusion The target sign is helpful to the ultrasound diagnosis of schwannoma, and its formation is related to the unique tissue constitution of schwannoma.