CEACAM5 and pachyonychia congenita: Except for the above panels, there were many miRNAs that were demonstrated to contribute to the diagnosis of early-stage PC, such as a panel containing 6‐miRNAs (let‐7b‐5p, miR‐192‐5p, miR‐19a‐3p, miR‐19b‐3p, miR‐223‐3p and miR‐25-3p), serum miR-25 combined with CA19-9, and miR-17-5p methylation, which was superior to CA19-9 or CEA [22–24].