CD276 and ductal breast carcinoma in situ: Normal mammary glands showed minimal endothelial expression of B7-H3 as measured by histology composite score (CS = 0.01 ± 0.02 a.u.)while DCIS containing tissues had statistically significantly higher endothelial expression (CS = 45.96 ± 12.76 a.u., P < 0.001).