primary immunodeficiency disease
Also written as: PID — primary immunodeficiency disease
A genetically determined disorder resulting in increased susceptibility to infections due to defects in immune system development or function.
Full Definition
A heterogeneous group of inherited disorders characterized by intrinsic defects in the immune system that lead to increased susceptibility to infections, autoimmunity, malignancy, or immune dysregulation. Unlike secondary immunodeficiencies, these conditions result from genetic mutations affecting various components of innate or adaptive immunity. Primary immunodeficiency diseases range from mild antibody deficiencies to severe combined immunodeficiency. The field has expanded significantly with advances in genetic testing, leading to identification of numerous new disease entities. Proper classification and terminology are essential for accurate clinical documentation.
Usage
Usage note: Preferred over 'primary immune deficiency'; may be abbreviated as PID in clinical contexts.
In Context
- "Newborn screening programs have improved early detection of primary immunodeficiency diseases." — Public health policy document
- "The patient's family history suggested an inherited primary immunodeficiency disease." — Genetic counseling report