Fig 1: Pathological sectioning and immunohistochemical results. (A) Pathological section (hematoxylin-eosin staining): gastric adenocarcinoma, prone to low-adhesion carcinoma. (B) Immunohistochemical (IHC) results (5-mm paraffin section, primary antibody, HER2, Abcam (ab237715)): HER2 2+/FISH-, in the cancer tissues: > 10% of tumor cells had complete cell membrane (basement membrane) and weak-to-moderate staining was observed. (C) IHC results (5-mm paraffin section, primary antibody, Ki-67, Abcam (ab256724)): Ki-67 >80%, in the cancer tissues: brownish-yellow granules in the nucleus were positive, and the percentage of Ki-67-positive cells was more than 80%.