However, a number of deleted loci contained known tumour suppressor genes that have been associated with other cancers, as defined by TSGene2.0, such as Epha, Robo1, Arl6, Cadm2, Lipi, Prb1 and Sir1. The number of copy number events did not correlate with time in culture (See Additional file 1). This evidence concerns the gene CADM2 and cancer.