SDHB and gastrointestinal stromal tumor: The SDH‐deficient GIST diagnostic algorithm, developed by the Life Raft Group (LRG) and used in the College of American Pathology (CAP) and NCCN guidelines, demonstrated that implementing SDHB IHC staining for all gastric tumors significantly increased the diagnosis rate of SDH‐deficient GIST by 60% [52].