Clustering of UBC lines according to the expression of gene signatures used to molecularly classify primary tumors. (A) Cell lines displaying expression patterns of the “Urobasal A”, “Urobasal B”, and “SCC-like” by Sjodahl et al . The “Genomically Unstable” category is poorly defined. (B) Cell lines displaying expression signatures of “Basal-like” or “Non Basal-like” tumors according to the classification of Rebouissou et al. .