In the case of the TCGA COAD dataset, the combined ROC curve of WASL, GRB2, SRC, and Tks4 gene expression yielded the same high accuracy as before (AUC value = 0.98), indicating that the separation of normal and tumor samples is achievable based on the reduced gene set’s expression data (see Figure 7A). The gene discussed is GRB2; the disease is neoplasm.