FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term CD40 ligand deficiency ID (Ontology) DOID:0060022 (Human Disease)
Definition A combined T cell and B cell immunodeficiency that is a X-linked immunodeficiency with hyperimmunoglobulin M (XHIM) affecting isotype switching and is caused by the absence of CD40 ligand which is normally expressed on activated CD4+ T cells. Individuals with this mutation are unable to switch from IgM to IgG, IgA and IgE.
Also Known As "HIGMX-1" ; "X-linked hyper-IgM syndrome"
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X-linked monogenic disease
 |__X-linked recessive disease___________________
combined immunodeficiency                        |
 |__combined T cell and B cell immunodeficiency__|
                                                 CD40 ligand deficiency
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Is a X-linked recessive disease
combined T cell and B cell immunodeficiency
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Synonyms
  • "HIGMX-1" EXACT OMO:0003012
    "X-linked hyper-IgM syndrome" EXACT
Secondary IDs
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MIM:308230