CEACAM5 and neoplasm: However, there were nonsignificant correlations between serum and exosomal LDHC levels and clinicopathological indicators such as gender, age, tumor size (all P > 0.05, data not shown), as well as serum levels of carcino-embryonic antigen (CEA), Golgi protein 73 (GP-73), and glycoprotein antigen 199 (CA19-9) (Figure 4C–4E, 4H–4J).