Agammaglobulinemia

An immunologic deficiency state characterized by an extremely low level of generally all classes of gamma-globulin in the blood. This definition is taken from the National Library of Medicine's MeSH (Medical Subject Headings) 2026 release, which is the standard vocabulary used to index PubMed and most medical literature.

Yes. Agammaglobulinemia is also referred to as Agammaglobulinemias, Hypogammaglobulinemia, Hypogammaglobulinemias in different clinical, research and patient-facing contexts. The MeSH descriptor groups all of these synonyms under a single canonical concept so research and records stay consistent.

Agammaglobulinemia falls under the broader medical category "Diseases" in the MeSH hierarchy (tree numbers: C15.378.147.142, C15.604.515.032, C20.673.088). Browsing the related concepts on this page takes you to neighbouring topics in the same branch of medicine.

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