Pediatric Immunology Glossary
100 terms total — 24 showing — Last updated 15 Sep 2026
opsonization
The process of coating pathogens with antibodies or complement proteins to enhance phagocytosis by immune cells.
graft-versus-host disease
A complication of bone marrow transplantation where donor immune cells attack recipient tissues.
hapten
A small molecule that becomes immunogenic only when bound to a larger carrier protein, relevant in pediatric drug allerg...
HSCT
Hematopoietic stem cell transplantation, a curative treatment for severe primary immunodeficiency disorders.
hyper-IgE syndrome
Primary immunodeficiency characterized by extremely elevated IgE levels, recurrent skin and lung infections, and distinc...
hypogammaglobulinemia
Abnormally low levels of gamma globulins (antibodies) in the blood, leading to increased susceptibility to infections.
hypogammaglobulinemia of infancy
A temporary condition of low immunoglobulin levels in infants, typically resolving as the child's immune system matures.
hypomorphic mutation
A genetic mutation that reduces but does not eliminate protein function, often causing milder immunodeficiency phenotype...
IL-2 receptor deficiency
A primary immunodeficiency caused by mutations affecting interleukin-2 receptor components, impairing T-cell activation.
immune complex
Molecular complexes formed by antibodies bound to antigens that can deposit in tissues and cause inflammatory damage in...
immune dysregulation
Abnormal immune system control leading to inappropriate responses such as autoimmunity or excessive inflammation in pedi...
Immune Dysregulation Polyendocrinopathy Enteropathy X-linked
A rare X-linked primary immunodeficiency caused by FOXP3 mutations, characterised by severe early-onset autoimmunity inc...
immune dysregulation syndrome
Group of primary immunodeficiencies characterized by autoimmunity, autoinflammation, and atopy due to defective immune r...
immune reconstitution
The recovery of immune function following treatment, particularly after bone marrow transplantation or gene therapy in i...
immune reconstitution inflammatory syndrome
A paradoxical inflammatory response that occurs following immune system recovery in immunocompromised patients.
Immunoglobulin G Subclass Deficiency
A condition characterised by deficient serum levels of one or more of the four IgG subclasses (IgG1–IgG4) despite normal...
immunoglobulin replacement therapy
Treatment involving administration of pooled human immunoglobulins to patients with antibody deficiencies.
immunoglobulin subclass deficiency
Selective reduction in specific IgG subclasses while total IgG levels remain normal, causing recurrent infections in chi...
immunologic reconstitution
The process of restoring normal immune system function following treatment for primary immunodeficiency disorders.
immunological memory
The immune system's ability to rapidly recognize and respond to previously encountered antigens, fundamental to pediatri...
immunophenotyping
Flow cytometric analysis of immune cell surface markers to characterize and quantify lymphocyte populations.
immunosenescence
Age-related decline in immune system function affecting both innate and adaptive immunity in pediatric patients with chr...
inborn error of immunity
The current preferred term for primary immunodeficiencies, emphasizing their genetic basis and diverse manifestations.
IPEX syndrome
A rare X-linked immunodeficiency characterized by immune dysregulation, polyendocrinopathy, enteropathy, and X-linked in...
IVIG
Intravenous immunoglobulin therapy used to replace antibodies in patients with immunodeficiency disorders.