高频超声与CT对腮腺混合瘤的诊断价值比较

Comparing the value of high-frequency ultrasound and CT in the diagnosis of mixed parotid tumors

目的:比较高频超声与CT对腮腺混合瘤的诊断价值。方法:回顾性分析弋矶山医院91例腮腺肿瘤手术患者资料(共91个瘤体),术前均接受高频超声和CT检查,依据瘤体直径将91个瘤体分为A组53例(瘤体直径>2.0cm),B组38例(瘤体直径≤2.0cm)。以病理诊断为金标准,分别计算出总体以及A、B两组两种检查方法的符合率、灵敏度及特异度。结果:高频超声诊断腮腺混合瘤总体符合率、灵敏度和特异度分别为75.8%、76.0%、75.6%,CT分别为72.5%、78.0%、65.9%,两种检查方法的符合率、灵敏度、特异度差异均无统计学意义(P>0.05)。A组高频超声诊断腮腺混合瘤符合率、灵敏度和特异度分别为81.1%、84.6%、77.8%;CT分别为58.5%、61.5%、55.6%,两种检查方法的符合率差异有统计学意义(P<0.05)。B组高频超声诊断腮腺混合瘤的符合率、灵敏度和特异度分别为68.4%、66.7%、71.4%;CT分别为92.1%、95.8%、85.7%,两种检查方法的符合率和灵敏度差异有统计学意义(P<0.05)。结论:对于大瘤体直径的腮腺混合瘤高频超声诊断效率优于CT检查,而对于小瘤体直径的腮腺混合瘤CT检查的诊断效率优于高频超声。

Objective:To compare the diagnostic value of high-frequency ultrasound and CT detection for mixed tumors of the parotid galnd. Methods:Retrospective analysis was performed in 91 cases of parotid tumor (91 tumors)surgically treated in our hospital.All patients underwent high-frequency ultrasound and CT examination before operation.The 91 tumors,confirmed by pathological findings as golded standard,were divided into group A( n= 53,diameter>2.0 cm) and group B( n= 38,diameter≤2.0 cm)by tumor size.Then the coincidence rate,sensitivity and specificity were generally and individually estimated for the two diagnoses between groups. Results:Generally,the coincidence rate,sensitivity and specificity were 75.8%,76.0% and 75.6% for high-frequency ultrasound,and 72.5%,78.0% and 65.9% for and CT examination,respectively.The difference was insignificant between groups( P> 0.05).The coincidence rate,sensitivity and specificity were 81.1%,84.6% and 77.8% by high-frequency ultrasound,and 58.5%,61.5% and 55.6% by CT,respectively,for mixed parotid tumor in group A.The difference was significant in the coincidence rate between the two methods(P<0.05).In group B,the coincidence rate,sensitivity and specificity were 68.4%,66.7% and 71.4% by high-frequency ultrasound,and 92.1%,95.8% and 85.7% by CT,respectively,for diagnosis of mixed parotid tumors.The difference was significant in coincidence rate and sensitivity between the two diagnoses(P<0.05). Conclusion:High-frequency ultrasound is better for diagnosis of larger sized mixed tumors of the parotid,whereas CT is favorable to the smaller sized neoplasm.