Hierarchical cluster analysis of 237 genes which were differentially expressed between BRAFwt and BRAFmut PTCs. Gene expression of TN samples is included in analysis. Color scheme for expression levels: red for comparably higher and blue for comparably lower expression. Color scheme for groups in the left sided branches: green for TN samples, purple for BRAFwt, and red for BRAFmut PTCs. Stars mark samples from recurrence or local metastasis, and LN metastasis.