SLC39A9 and gastrointestinal stromal tumor: While KIT mutations are well-known drivers of GIST, tissue-specific genes such as the serine/threonine protein kinase TESK1, the myelin regulatory factor MYRF, as well as the 5-oxo-L-prolinase OPLAH or the zinc influx transporter SLC39A9 have not been associated with cancer before.