GIPC2 and metastatic neoplasm: The area-under-the-curve (AUC) values for GIPC2 (Fig. 8i) were 0.953 (95% confidence interval [CI], 0.75–0.95; sensitivity, 83.3%; specificity, 83.3%) and 0.80 (95% CI, 0.899–1.007; sensitivity, 86.7%; specificity, 90.3%) for the primary and metastatic tumors, respectively.