CEACAM5 and colorectal carcinoma: This contrasts with conventional markers CEA (median: 3.307 ng/mL, IQR: 2.296–4.892 ng/mL in CRC and median: 1.654 ng/mL, IQR: 1.086–2.446 ng/mL in healthy controls) and CA19‐9 (median: 11.23 IU/mL, IQR: 8.514–14.75 IU/mL in CRC and median: 8.141 IU/mL, IQR: 6.169–10.36 IU/mL in healthy controls), which also showed elevation but to a lesser extent (Figure 3A and Figure S1A).