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. Author manuscript; available in PMC: 2007 Apr 4.
Published in final edited form as: Eur J Cancer. 2006 Oct 31;43(2):415–432. doi: 10.1016/j.ejca.2006.09.001

Fig. 3.

Fig. 3

Unsupervised hierarchical cluster analysis in oropharyngeal tissue samples. From a total of 22,215 transcripts on the microarray, 8,286 genes showed variations in expression across all the samples. From this group of filter genes, we identified 7 clusters of genes that show differential expression between the 3 groups of samples (HPV-positive SCCHN, HPV-negative SCCHN and normal oral mucosa). Genes also found in the supervised statistical analysis are underlined.