Diagnostic value of MRI combined with DWI quantitative analysis parameters in differentiation of patients with benign and malignant parotid tumors

WANG Jialin; WANG Mengyin; WEI Mengjia; ZHANG Bowen; JI Xiaoxi

doi:10.20258/j.cnki.1006-9011.2025.07.005

Abstract：Objective To explore investigate the magnetic resonance imaging(MRI)features and quantitative parameters of magnetic resonance diffusion weighted imaging(DWI)in patients with benign and malignant parotid tumors.Methods 60 pa-tients with parotid gland tumors were admitted.Clinical data of the study subjects were retrospectively collected.The qualitative diagnostic results of parotid tumors were analyzed,the MRI image characteristics of different types of parotid tumors and the quantitative analysis parameters of DWI were analyzed,and the differential diagnosis of benign and malignant parotid tumors by MRI,DWI,and MRI combined with DWI was compared with the pathological diagnosis,and the receiver operating characteris-tic(ROC)curve was drawn to analyze the diagnostic value of MRI and DWI alone and combined detection in benign and malig-nant parotid tumors.Results There were 60 patients with parotid gland tumors,including 89 masses.There were 26 were malig-nant masses,including 15 of mucoepidermoid carcinoma(57.69%),7(26.92%)of acinar cell carcinoma,and 4(15.38%)of other types.There were 63 benign masses,including 41 of adenomas(65.08%),16 of pleomorphic adenomas(25.40%)and 6 of other tumors(9.52%).There were 63 benign masses,including 41 of adenomas(65.08%),16 of pleomorphic adenomas(25.40%)and 6 of other masses(9.52%).The malignant boundary of parotid gland tumor was clear,the shape was regular,the signal was uniform,there was no surrounding tissue invasion,and the proportion of no lobed was lower than that of benign pa-rotid gland tumor(P<0.05).When b=600,800,1 000 s/mm2,the apparent diffusion coefficient(ADC)of parotid tumor was lower than that of benign parotid tumor(P<0.05).Among the 89 parotid tumor masses confirmed by pathological examination,26 were malignant,16 were confirmed by MRI,18 by DWI,and 24 by MRI combined with DWI.Malignant parotid tumors were included as positive and benign parotid tumors as negative.ROC curve was drawn,the area under the curve(AUC)of MRI com-bined with DWI was 0.898,the sensitivity was 92.31%,and the specificity was 87.30%,which had high value in differentiating benign and malignant parotid tumors.Conclusion MRI features and DWI quantitative analysis parameters were different in dif-ferent types of parotid tumors.MRI combined with DWI examination was of high value in differentiating benign and malignant pa-rotid tumors,which could lay a foundation for its diagnosis and treatment.