CEACAM5 and neoplasm: Thyroid function was normal (TSH 0.73 μUI/mL, FT4 7.8 pg/mL, Ct <1 pg/mL) and tumor markers (CA19.9 and CEA) were normal, except for slightly elevated NSE (11.1 μg/L, with a normal range < 10.0 μg/L).