Using the expression level of HER2-SRM as a linear model to predict and determine whether mixed-type gastric adenocarcinoma (Lauren classification) has intestinal phenotype features through ROC curve analysis (as shown in Figure 9B), the results indicate that HER2-SRM expression level has a high classification performance in the pathological diagnosis of mixed-type gastric cancer with intestinal phenotype features, with an AUC of 0.864. The gene discussed is ERBB2; the disease is gastric adenocarcinoma.