CEACAM5 and colorectal carcinoma: Exosomal RPPH1 expression was significantly higher in CRC patients and significantly decreased following surgical resectionDiagnostic power of RPPH1 (AUC = 0.856) was better than CEA (AUC = 0.790), CA 19-9 (AUC = 0.544) and CA 125 (AUC = 0.654)