The expression levelsof CEA, CA153, and CA125 in nipple discharge ofpatients with tumor diameter >5 cm, low differentiation,high stage, metastasis, and recurrence were significantlyhigher than those of patients with tumor diameter 5 cm, high differentiation, low stage, andno metastasis and recurrence (P<0.05) (Table 4). Here, CEACAM5 is linked to neoplasm.