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An immune disorder is a dysfunction of the immune system. [1] These disorders can be characterized in several different ways: By the component(s) of the immune system affected; By whether the immune system is overactive or underactive; By whether the condition is congenital or acquired
Immune dysregulation is any proposed or confirmed breakdown or maladaptive change in molecular control of immune system processes. For example, dysregulation is a component in the pathogenesis of autoimmune diseases and some cancers .
Without functional ribonucleotide reductase, lymphocyte proliferation is inhibited and the immune system is compromised. Purine nucleoside phosphorylase deficiency: An autosomal recessive disorder involving mutations of the purine nucleoside phosphorylase (PNP) gene. PNP is a key enzyme in the purine salvage pathway.
Hypersensitivity (also called hypersensitivity reaction or intolerance) is an abnormal physiological condition in which there is an undesirable and adverse immune response to an antigen. [1] [2] It is an abnormality in the immune system that causes immune diseases including allergies and autoimmunity.
Primary immunodeficiencies are disorders in which part of the body's immune system is missing or does not function normally. [1] To be considered a primary immunodeficiency (PID), the immune deficiency must be inborn, not caused by secondary factors such as other disease, drug treatment, or environmental exposure to toxins.
Immune hemolytic states are those, both anemic and nonanemic, which involve immune mechanisms consisting of antigen-antibody reactions. These reactions may result from unrelated antigen-antibody complexes that fix to an innocent-bystander erythrocyte, or from related antigen-antibody combinations in which the host red cell or some part of its ...
Immunodeficiency, also known as immunocompromisation, is a state in which the immune system's ability to fight infectious diseases and cancer is compromised or entirely absent. Most cases are acquired ("secondary") due to extrinsic factors that affect the patient's immune system.
A class of diseases, some of which may be autoimmune. Erythroblastosis fetalis: Mother's immune system attacks fetus. An immune system disorder but not autoimmune. Fibrodysplasia ossificans progressiva: Possibly an immune system disorder but not autoimmune. Gastrointestinal pemphigoid: No consistent evidence of association with autoimmunity.