Therefore, there is a possibility that gene dosage increase of MAPK15 in this study may affected by amplification of MYC. To rule out the possibility, we analyzed the prevalence of co-amplification of MAPK15 and MYC. Based on aCGH data, copy number gains of MYC (8q24.21) and MAPK15 (8q24.3) were found in 12 and 8 of 40 gastric cancers, respectively. Here, MAPK15 is linked to gastric cancer.