The TCGA database was used to analyze the expression of 12 core genes, including COL1A1, COL1A2, COL3A1, COL5A1, BGN, COL6A3, FN1, COL11A1, COL6A2, COL4A2, GKN1, and VCAN in gastric cancer patients. Here, COL6A2 is linked to gastric cancer.