Yoon et al.108 reported that serum GKN1 levels were significantly higher in healthy controls (median: 6.34 ng/μL, interquartile range (IQR): 5.66–7.54 ng/μL) than in GC patients (median: 3.48 ng/μL, IQR: 2.90–4.11 ng/μL; P < 0.0001). The gene discussed is GKN1; the disease is gastric cancer.