Fatal HLH in patients with X-linked lymphoproliferative disease 1 due to a novel variant in SH2D1A: case report
IntroductionX-linked lymphoproliferative disease type 1 (XLP1) is an inborn error of immunity (IEI) caused by pathogenic variants in the SH2D1A gene, leading to severe immune dysregulation, often triggered by Epstein-Barr virus (EBV) infection. Hemopha…