A reduced logistic model including between-sample diversity (EMD) for GLUT1 and within-sample diversity (CID) for ER had statistically significant coefficients (GLUT1 EMD, p = 0.01; ER CDI, p = 0.01) and included 40 pure DCIS cases and 52 synchronous DCIS cases. This evidence concerns the gene SLC2A1 and ductal breast carcinoma in situ.