Figure 3From: Molecular apocrine differentiation is a common feature of breast cancer in patients with germline PTEN mutations Principal components analysis using the Cowden and molecular apocrine (Farmer) signatures (13). The first two principal components were used to plot the tumors from this study in A and C, and to plot the tumors from the Farmer study in B and D. The genes used were derived from the Cowden signature in A and B, and from the Farmer signature in C and D. In both cases, the signatures from the two studies identify the same tumors.Back to article page