CEACAM5 and gastric cancer: These markers have been confirmed to be associated with prognosis and recurrence of GC after surgery.4,5 However, previous studies mainly focused on the pre-operative level of CEA and CA19-9.6–8 There are rare and conflicting studies evaluating the prognostic value of post-operative tumour markers.9,10 Therefore, the purpose of this study was to determine whether pre- or post-operative combined tumour markers (CEA and CA19-9) are more prognostic.