Patients with low-grade tumours had lower sCD163, sCD206, and sSIRPα compared to patients with high-grade tumours (sCD163: 1.83 mg/L vs. 2.13 mg/L, p = 0.08; sCD206: 0.22 mg/L vs. 0.29 mg/L, p < 0.001; and sSIRPα: 24.85 μg/L vs. 28.6 μg/L, p = 0.01; see Supplementary Table S1). Here, CD163 is linked to neoplasm.