<0.05)。根据曲线下面积(area under the curve,AUC)筛选出鉴别诊断价值最高的3项超声特征分别为网状条索、血流分级和长短径之比。网状条索诊断WT的灵敏度68.49%,特异度95.56%,AUC为0.820;血流分级诊断WT的灵敏度76.56%,特异度71.43%,AUC为0.740;长短径之比以1.51为截断值,诊断WT的灵敏度65.80%,特异度80.00%,AUC为0.708。
To evaluate the clinical value of ultrasonography in the differential diagnosis of pleomorphic adenoma and Warthin tumor (WT) in parotid gland.
Methods:
Forty-five pleomorphic adenomas and seventy-one WT were confirmed by surgical histopathology after the ultrasonography process. And the parameters including gender
age
multifocality
maximum diameter
minimu
m diameter
maximum and minimum diameter ratio
shape
margin
echogenicity
heterogeneity
cystic degeneration
reticular cord
calcification
posterior echogenicity and grades of vascularity were retrospectively compared between the groups mentioned above. The receiver operating characteristic (ROC) curve was also plotted to analyze the diagnostic efficacy of ultrasonic indicators of WT in parotid gland.
Results:
Gender
age
multifocality
maximum diameter
maximum and minimum diameter ratio
shape
echogenicity
heterogeneity
cystic degeneration
reticular cord
posterior echogenicity and grades of vascularity were the significant factors for differentiating WT from pleomorphic adenoma. Three ultrasonic features with high value of differential diagnosis filtrated according to the area under curve (AUC) were reticular cord
grades of vascularity and maximum and minimum diameter ratio. The sensitivity and specificity of reticular cord in differentiation of WT from pleomorphic adenoma were 68.49% and 95.56%. The AUC was 0.820. The sensitivity and specificity of grades of vascularity were 76.56% and 71.43%. The AUC was 0.740. When the cutoff value was 1.51
the sensitivity and specificity of maximum and minimum diameter ratio were 65.80% and 80.00%. The AUC was0.708.
Conclusion:
There are significant differences in ultrasonic features between pleomorphic adenoma and WT. Reticular cord
grades Ⅱ-Ⅲ of vascularity and the maximum and minimum diameter ratio greater than 1.51 are important characteristics of WT.