During the 4-year follow-up period, the size of splenic cyst remained stable (approximately 10 cm × 8 cm), and serum tumor markers including carbohydrate antigen (CA)19–9, carcinoembryonic antigen (CEA), CA125, CA242, and CA50 were within the normal range until 5 days ago. Here, CEACAM5 is linked to neoplasm.