AFP and neoplasm: For example, 4 cases (0.6%) in our study showed a postoperative increase in tumor markers, three of which were positive for DCP preoperatively, with postoperative DCP levels dropping to negative but AFP levels rising to positive (rising from 11.6 ng/mL to 23.8 ng/mL, 12ng/mL to 32.5 ng/mL, and 11 ng/mL to 39 ng/mL respectively).