CEACAM5 and anemia: The AUCs of 18F-FDG PET/CT imaging factors, including the SUVmax of bone lesions, bone changes, and location of bone lesions combined with the model generated from clinical factors, including SRE, anemia, ALP, CEA, CA199, and LDH, were significantly higher than those of the model with clinical factors (p = 0.021) or 18F-FDG PET/CT imaging factors alone (p = 0.016) in the training set (Figure 4A).