Genes identified as being differentially expressed in three or more studies of RCC gene expression. Each column represents a different microarray study of RCC gene expression. In each column, filled boxes indicate that the gene was reported as being differentially expressed in RCC except in the case of the Higgins et al. column where filled boxes indicate that the gene is differentially expressed based on our re-analysis of their data. Dark grey boxes indicate that a gene was reported as induced in RCC compared to normal kidney tissue while light grey boxes indicate that a gene is repressed. The gene identifier reported is either the gene symbols associated with a sequence in the unigene database as reported by NETAFFX or the unigene cluster ID. The gene identifiers in bold type refer to currently unannotated sequences.