CEACAM5 and neoplasm: Ultimately, age (P = 0.024), tumor location (P = 0.002), perimeter ratio (P = 0.017), tumor size (P = 0.002), pathological type (P = 0.000), tumor invasion depth (P = 0.001), CEA level (P = 0.005) and gross type (P = 0.037) were identified as independent risk factors for PMCC (Table 2).