Primary Immunodeficiencies (PIDs) encompass a group of over 450 rare, mostly monogenic disorders, characterized by defects inthe immune system.
These conditions typically result in increased susceptibility to infections, immune dysregulation (such as autoimmunity), and malignancies. Conditions such as Severe Combined Immunodeficiency, primary antibody deficiency, hemophagocytic lymphohistiocytosis, and chronic granulomatous disease fall under this category. Currently, more than 500 distinct primary immunodeficiencies have been described. Patients with PIDs may present with recurrent, severe, or unusual infections that are often resistant to standard treatments. Diagnosis often involves immunophenotyping, functional assays, and genetic testing to identify the specific immune defect. Treatment strategies vary based on the underlying defect and may include immunoglobulin replacement therapy, hematopoietic stem cell transplantation, gene therapy, and targeted biological agents. Early diagnosis and appropriate management are crucial to improve the quality of life and prognosis of affected individuals. Given their complexity and rarity, these diseases often require specialized care and ongoing monitoring.
