Lymphoproliferative Syndrome, X-Linked, 2

Alternative Names

  • XLP2
  • XIAP Deficiency
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WHO-ICD-10 version:2010

Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism

Certain disorders involving the immune mechanism

OMIM Number


Gene Map Locus



XLP2 is an X-linked primary immune deficiency with symptom onset usually in the first years of life, although later onset may occur. Features are compatible with immune dysregulation and include hemophagocytic lymphohistiocytosis (HLH), often associated with chronic Epstein-Barr virus (EBV) infection, splenomegaly, fever, colitis or inflammatory bowel disease (IBD), and recurrent infections. Laboratory abnormalities are variable, but can include hypogammaglobulinemia, cytopenias, and low levels of a particular subset of T cells known as NKT (or iNKT) cells. [From OMIM]

Epidemiology in the Arab World

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Subject IDCountrySexFamily HistoryParental ConsanguinityHPO TermsVariantZygosityMode of InheritanceReferenceRemarks
300635.1LebanonMaleNo Hemophagocytosis... NM_001204401.2:c.1023_1026delHemizygousX-linked, RecessiveJalkh et al. 2019
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