Diagnoses of breast ductal carcinoma in situ by combination of ultrasound and mammography

Objective To analyze the features of ductal carcinoma in situ(DCIS)by ultrasound and mammography and estimate the accuracy of ultrasound,mammography and combination of both methods in diagnosis of DCIS.Methods To analyze the mammographic and sonographic images of breast DCIS in 35 patients confirmed by pathology and assessed by BI-RADS(4th).Results The solid lesion in 9 cases,and ductal ectasia filled with stuff cases in 15 cases,and architecture disorder cases in 3 cases,and mass contains both anechoic and echogenic components in 1 case,and calcification only in 2 cases were observed by ultrasound.By mammography,calcifications were found in 23 cases,nodular lesion or local increased density in coincidence rates of ultrasound and mammography of DCIS were 66.6% and 80.0%,respectively.The accuracy of ultrasound and mammography was not statistically different(χ2=0.900χ20.05,1,P0.05)and the coincidence rate of combination of both methods was 90.0%,higher than that of ultrasound(χ2=5.142χ 20.05,1,P0.05).Conclusions High-frequency ultrasound and mammography are important in diagnosis of DCIS.The diagnostic accuracy can be improved by combination of ultrasound and mammography.