SALL4 and gastric cancer: Significantly, our laboratory has developed and characterized specific isoform A of anti-SALL4 monoclonal antibody (mAb) for the first time [21].To elucidate the role of the SALL4-A isoform in gastric tumor behavior, this study involved collecting formalin-fixed paraffin-embedded tissue samples from 167 gastric cancer patients, encompassing various subtypes, including signet ring cell and intestinal types.