L1CAM and gastric cancer: In the early stage, the AUC for L1CAM diagnosis of GC and EJA was 0.679 (95% CI: 0.601-0.758) and the sensitivity / specificity was 75.0% (95% CI: 61.9% -84.9%) / 62.2% (95% CI: 53.8 % -69.9%) (Figure 2A and Table 3).