Highlights from the article: Keywords: inborn error of immunity; IEI; primary immunodeficiency; PID; cancer predisposition syndrome; CPS In addition to perturbed tumor immune surveillance in IEI and chronic inflammation or infections, the molecular defect I per se i that causes IEI may predispose to tumorigenesis ([5]). Inborn error of immunity, IEI, primary immunodeficiency, PID, cancer predisposition syndrome, CPS.