Value of ADC in differential diagnosis of parotid pleomorphie adenoma and adenolymphoma / 医疗卫生装备

ABSTRACT

Objective To evaluate the differential diagnostic value of the apparent diffusion coefficient(ADC)for the parotid polymorphic adenoma and adenolymphoma. Methods Totally 31 parotid polymorphic adenoma patients and 20 adenol-ymphoma patients confirmed pathologically had their data on diffusion weighted imaging(DWI)analyzed retrospectively with b set as (0, 1 000 s/mm2). The mean values of ADC were obtained by measuring the solid parts for three times, and the difference between ADC values of the two kinds of tumors were analyzed and compared.SPSS 17.0 software was used for data analysis.Results The parotid polymorphic adenoma had the ADC value being(1.55±0.45)×10-3mm2/s,the parotid adenolym-phoma had the ADC value as(1.01±0.35)×10-3mm2/s,and there was statistical difference between the ADC values of parotid polymorphic adenoma and adenolymphoma(P=0.001).Conclusion ADC value is of great value for the identification of the parotid pleomorphie adenoma and adenolymphoma,and thus can be used for the selection of clinical surgical plans.