Moreover, higher levels of serum B7-H6 were detected in OAC patients with a higher tumour regression grade TRG (TRG 3–5, n = 6) which is indicative of poor treatment response, compared to patients with a lower TRG (TRG 1–2, n = 4) (Low TRG vs. High TRG; 257.0 pg/ml vs. 967.2 pg/ml, p = 0.1021) (Fig. 3D). This evidence concerns the gene NCR3LG1 and neoplasm.