Similarly, d-dimer levels correlated significantly with CA19-9 (r = 0.866, p < 0.001), CEA (r = 0.866, p < 0.001), tumor stage (r = 0.570, p < 0.001), and metastasis stage (r = 0.398, p < 0.001), but not histological grade (r = 0.053, p = 0.603) (Fig. 2). The gene discussed is CEACAM5; the disease is neoplasm.