Expression of the CSPG4 and the CHST11 genes was detected in breast tissue samples. mRNA expression was quantified by absolute quantification and the ratio of mRNA to 18S mRNA was calculated. The fold change in tumor sample compared to normal tissue sample in each subject was calculated and plotted. Circles denote individual observations, while squares with error bars represent group means with their 95% confidence intervals (CIs). CSPG4 and CHST11 were elevated 3.2 (P < 0.02) and 1.8 (P = 0.034) fold, respectively in tumor-containing samples over normal samples.