Abstract:

Objective  To explore the computed X-ray tomography(CT) manifestations of Warthin′s tumor(WT) and polymorphic adenoma(PA), and to analyze the differences in the proportion of smokers and smoking index.

Methods  Eighty patients with benign tumors of the parotid gland were selected and divided into WT group(n=32) and PA group(n=48) according to the results of pathological examination. All patients underwent CT examination to compare the CT manifestations, the proportion of smokers and smoking index between two groups.

Results  The CT findings of the two groups were significantly different in location, number, boundary, and tumor diameter(P＜0.05). The lesion in WT group was mostly located in the posterior lower quadrant, with multiple occurrences, regular morphology, clear boundaries, and larger tumor diameters. The lesion in PA group was mostly located in the non-lower posterior quadrant, with very few occurrences, regular morphology, clear boundaries, and small tumor diameters. The CT value of the WT group increased initially and then decreased, and the CT value of the PA group gradually increased. The difference in the interaction between groups, time points and time points between groups with respect to CT values was statistically significant(P＜0.05). The proportion of smoking, smoking index, smoking amount, and smoking time in the WT group were higher than those in the PA group, and the difference was statistically significant(P＜0.05).

Conclusion  WT lesions are mostly located in the posterior lower quadrant and show the pattern of “fast in and fast out” during CT enhancement. PA lesions are mostly located in the non-posterior lower quadrant and show progressive enhancement during CT enhancement. The clinical data and CT image characteristics can be used to differentiate WT and PA, and the appropriate treatment can be selected according to the results.

Key words: parotid neoplasm；tomography, X-ray computed, smoking