Any significant difference between patient body mass index (BMI) (< 28 and ≥ 28), treatment route (laparotomy versus laparoscopy), therapy type (adjuvant versus chemotherapy), carcinoembryonic antigen (CEA) levels, and levels of cancer antigens (i.e., 19 − 9, 15 − 3 and 12 − 5 between the four differing TCGA groups) was not observed. Here, CEACAM5 is linked to cancer.