Value of the vascular index measured by three-dimensional superb microvascular imaging in the differential diagnosis of parotid pleomorphic adenoma and Warthin tumor
Objective To explore the value of vascular index(VI)measured by three-dimensional superb microvascular imaging(3D-SMI)in the differential diagnosis of parotid pleomorphic adenoma(PA)and Warthin tumor.Methods A total of 88 patients with parotid gland tumor confirmed by surgery and pathology in our hospital were selected,including 51 patients with PA and 37 patients with Warthin tumor,all patients were examined by CDFI,two-dimensional superb microvascular imaging(2D-SMI),3D-SMI and contrast-enhanced ultrasound(CEUS).The differences of the above ultrasonic image features and quantitative parameters between PA and Warthin tumor were compared.The regression models were established based on CDFI parameters,2D-SMI parameters and CEUS parameters for the differential diagnosis of PA and Warthin tumors.Receiver operating characteristic(ROC)curve was drawn to analyze the diagnostic efficiency of VI,CDFI model,2D-SMI model and CEUS model in distinguishing PA from Warthin tumor.Results There were significant differences in vascular distribution type and blood flow grading of CDFI and 2D-SMI between PA and Warthin tumors(both P<0.001).There were statistically significant differences in enhancement degree,uniform enhancement,peak intensity,half time to descent,120 s intensity,area under the cure and semi-descent slope between PA and Warthin tumors(all P<0.05).ROC curve analysis showed that the area under the curve of VI,CDFI model,2D-SMI model and CEUS model in distinguishing PA from Warthin tumors were 0.924,0.750,0.806 and 0.883,respectively.There were statistically significant differences in the area under the curve between VI and CDFI model and 2D-SMI model(both P<0.05),while there was no statistically significant differences in the area under the curve between VI and CEUS model.Conclusion VI measured by 3D-SMI has certain clinical value in the differential diagnosis of parotid PA and Warthin tumor,and its diagnostic efficiency is comparable to CEUS,and significantly better than 2D-SMI and CDFI.
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