
Keywords: فرمالین بافر خنثی; 5-FU; 5-fluorouracil; FDA; Food and Drug Administration; FISH; fluorescent in situ hybridization; GEJ; gastroesophageal junction; HER2; human epidermal growth factor receptor 2; IHC; immunohistochemistry; ISH; in situ hybridization; NBF; neutral buffered