Anaphylaxis is a severe, life-threatening, systemic allergic reaction that is almost always unanticipated and may lead to death by airway obstruction or vascular collapse. Anaphylaxis can be triggered by a broad range of triggers. Food is the commonest trigger in children and drugs the commonest in adults. In addition to the environmental influences, studies suggest that a complex of genes affects the anaphylactic response. Anaphylaxis occurs as the result of an allergen response, usually immunoglobulin E-mediated, which leads to mast cell and basophil activation and a combination of dermatologic, respiratory, cardiovascular, gastrointestinal, and neurologic symptoms.
Category
Immune system disease
Brite
Human diseases [BR:br08402]
Immune system diseases
Allergies and autoimmune diseases
H01359 Anaphylaxis
Human diseases in ICD-11 classification [BR:br08403]
04 Diseases of the immune system
Allergic or hypersensitivity conditions
4A84 Anaphylaxis
H01359 Anaphylaxis