As is shown in the multi-colour immunofluorescence staining analysis of 135 GC tissues, ~90% of tissues show that NECTIN2, CEACAM1, HMGB1, SIGLEC6 and CD15 were expressed in tumour cells, and CD44 was expressed in tumour cells in about 70% of tissues. The gene discussed is NECTIN2; the disease is neoplasm.