SDHB and gastrointestinal stromal tumor: This included 12 tumors identified as KITWT/PDGFRAWT/BRAFWT/SDHWT/NF1WT/KRASWT/HRASWT/NRASWT or qWT GIST and 12 tumors identified as KITWT/PDGFRAWT/BRAFWT/NF1WT/KRASWT/HRASWT/NRASWT GIST with unknown SDH status.