Before revision:  For any given tissue, the cancer state is a kind of attractor in the gene expression state space with at least 2500 highly differentially-expressed genes and a power-like tail in the expression distribution function. With regard to this 4 \% quantile of genes, pairs of localizations share between 314 and 1889 genescharacterizing the tumor state.
After revision:  For any given tissue, the cancer state is a kind of attractor in the gene expression state space with at least 2500 highly differentially-expressed genes and a power-like tail in the expression distribution functions. 3) Tumors in different localizations share hundreds or even thousands of differentially expressed genes. There are 6 genes common to the 15 studied tumor localizations. 4 \% quantile of genes, pairs of localizations share between 314 and 1889 genescharacterizing the tumor state.