Objective To investigate the diagnostic value of microcalcifications in X - ray screening mammography for breast ductal carcinoma in situ(DCIS).Methods Fifty - eight women with mammographically suspected and then pathologically and immunohistologically confirmed DCIS were retrospectively analyzed.According to Breast Imaging Reporting and Data System(BI - RADS) issued by American College of Radiology(ACR),calcifications were described including their morphology and distribution.All the 58 lesions were correlated with pathology.A Fisher's exact test was used to estimate a possible contingence between shapes of microcalciftcaions and gradings of DCIS.Results Microcalcifications were categorized according to their morphology and distribution into three groups:fine-linear branching calcifications in 46 cases(79%);amorphous - clustered calcifications in 5 cases(8%);and punctate -coarse or popcorn - like calcifications in 7 cases(12%).Of the 58 DCIS lesions,14 were low - grade(grade 1) ones,accounting for 24%,35 were of the intermediate grade(grades 2),accounting for 60%and 9 were high - grade(grade 3 ) ones,accounting for 16%.Statistically,the morphology and distribution of microcalcifications in DCIS with different gradings varied significantly(P0. 001).The contingency coefficient was 0.559(P0.001),suggesting a significant contingence between grades and characteristics of microcacifications in DCIS.Conclusions Microcalcifications help detect early DCIS,the morphology and distribution of which also characterize the grading of the lesion.A feasible reading of calcifications in X - ray mammography facilitates the accuracy of diagnosis of this disease.

Objective To explore the mammography findings and cause of radiolucent ring and its diagnostic value in the benign and malignant lesions. Methods The thickness,density and margin shape were analyzed prospectively in 62 cases with radiolucent ring surrounding breast mass confirmed by pathology. Halo sign and corona sign were described by the thickness of radiolucent ring,and the findings and their attribution in benign and malignant lesions were compared. Results There were 32 halo sign (28 benign and 4 malignant cases) and 34 corona sign (13 benign and 21malignant cases) of 62 cases,and 4 of them had both radiolucent ring. Among 34 corona sign,there were 10 benign and 5 malignant in clear ring,but 3 and 16 cases respectively were found when radiolucent ring was muddy or speculated. Conclusion Halo sign and corona sign in mammography play an important role in differential diagnosis of benign and malignant lesions.

乳腺X线立体定位下置入钢丝使可疑病变[乳腺影像报告和数据系统(BI-RADS Ⅳ～V级)]能够定位、切检一次完成,是诊断不可触及的乳腺病变(nonpalpable breast lesion,NPBL)的金标准方法.