We established a classifier for the OS of PAAD patients based on 14 mRNAs = 0.006963639 * EXP(ADAM9) + 0.069425086 * EXP(ARHGAP42) + 0.077659645 * EXP(DDX60) − 0.029916764 * EXP(DMD) − 0.052925385 * EXP(DTNA) + 0.21956021 * EXP(EFNB2) + 0.101980826 * EXP(ERAP2) + 0.165217493 * EXP(GMNN) − 0.068491015 * EXP(ING5) + 0.122589990 * EXP(KYNU) − 0.017670448 * EXP(MTCP1) + 0.008851918 * EXP(OAS1) + 0.028523489 * EXP(SERTAD4) − 0.08385264 * EXP(TRIM52). The gene discussed is ADAM9; the disease is pancreatic adenocarcinoma.