Abstract：Objective: To review MSCT imaging features of 15 cases of basal cell tumor in parotid gland and explore its diagnostic value. Methods: Fifteen patients with pathologically confirmed basal cell tumor underwent preoperative MSCT plain-scan and dual-phase contrast scan. The change of CT value and enhancement patterns in the tumors were assessed. Quantitative analysis was performed to determine CT value changes of the tumors in different enhanced-phases as compared with the plain-scan. Compare these imaging features of basal cell tumor with those of other common benign tumors: pleomorphic adenomas and adenolymphomas. Analysis of variance was used for the statistical analysis. Results: Basal cell tumors showed isodense nodule with significant cystic area on CT plain-scan. At dual-phase scan, basal cell tumors showed a pattern of persistent strong enhancement with characteristic cystic areas. At arterial phase, the increase of CT value was the highest for basal cell tumors, which had statistical difference from pleomorphic adenoma(P<0.01). At venous phase, the increase of CT value was statistically different between basal cell tumor and the other two histopathologic types(P<0.05). Conclusion: Basal cell tumors showed hetergeneous isodense nodule on CT plain-scan, which showed a pattern of persistent strong enhancement with characteristic cystic areas. The CT features of basal cell tumors were different from those of the other two bengin tumors.
2009, Vol. 20 
