We focused on the fact that the most highly altered fatty acids are palmitoleic acid and oleic acid produced by SCD1 (Fig. 3A) and analyzed the correlation between SCD1 expression in tumor tissue and fatty acid ratios, FA16:1/FA16:0, FA18:1/18:0, representing SCD1 activity in serum using paired samples (Fig. 3B and C). Here, SCD is linked to neoplasm.