Next, analysed genes were categorised in three subgroups, i.e. an” urothelial” group with ten genes frequently altered in BLCA, a colorectal group with nine genes known to be affected in CORAD and a third group with only two genes (TP53 and PIK3CA) which are both commonly mutated in both tumour entities. This evidence concerns the gene PIK3CA and bladder transitional cell carcinoma.