Based on the increment of saturation magnetization, ΔMS, Chieh et al. [16] recently reported another assay method that used a vibrating sample magnetometer (VSM) to label tumor biomarkers of alpha-fetoprotein (AFP) in clinical studies via the ΔMS/MS-versus-ФAFP curve at the saturation field HS, where ФAFP was the concentration of AFP. This evidence concerns the gene AFP and neoplasm.