GPC3 and gastric cancer: In a study of 926 cases of gastric cancer, glypican3-expressing gastric cancer (GPC3-GC) was characterized as gastric carcinoma (GC) expressing GPC3 with their related entities: hepatoid, clear‐cell, and α‐fetoprotein‐producing GC, and defined as focal GPC3‐GC when 10–49% of neoplastic cells were positive, and as diffuse GPC3‐GC when more than 50% of the cells were positive [7].