Causes of Immunodeficiency Disorders: A Comprehensive Overview

Immunodeficiency disorders arise from diverse causes. Major categories include:

1. Genetic Defects (Primary Immunodeficiencies)

Inherited or spontaneous mutations affecting immune cell development/function. Examples: Severe Combined Immunodeficiency (SCID), X-linked Agammaglobulinemia, Wiskott-Aldrich Syndrome, DiGeorge Syndrome, Common Variable Immunodeficiency (CVID).

2. HIV/AIDS

HIV destroys CD4+ T cells, leading to Acquired Immunodeficiency Syndrome (AIDS).

3. Cancer & Cancer Treatments

Leukemia, lymphoma, and therapies like chemotherapy/radiation can suppress bone marrow and immune function.

4. Organ Transplantation

Immunosuppressive drugs to prevent rejection increase infection and cancer risk.

5. Autoimmune Diseases

Conditions like rheumatoid arthritis, lupus, and multiple sclerosis involve immune dysregulation that can weaken defense against infections.

6. Malnutrition

Severe protein-calorie or micronutrient deficiencies impair immune cell production and function.

7. Advanced Age (Immunosenescence)

Natural age-related decline in immune responsiveness increases susceptibility to infections and chronic diseases.

Accurate diagnosis requires medical evaluation to identify the underlying cause and guide treatment.