Figure 2

Cluster analysis. (A) Dendogram of unsupervised hierarchical cluster analysis of all samples. Clustering was based on 10,100 probes for which the average expression among all samples showed a standard deviation ≥ 0.15. Samples are labeled by sample group (NS/AK/SCC) and patient number (P-#). (B) Scatter plot of the first two components from PCA based on 6,104 probes for which the average expression among all samples showed a standard deviation/mean ≥ 0.1. Labels indicate the position for each sample (NS/AK/SCC) of a certain patient (P-#).