Judy Shizuru, MD, Blood and Marrow Transplant Specialist, Stanford University School of Medicine, gives an overview of severe combined immune deficiency (SCID).

As Dr. Shizuru explains, SCID is a group of inherited immune system disorders characterized by abnormalities with responses of both T cells and B cells. Common symptoms include an increased susceptibility to infections including ear infections; pneumonia or bronchitis; oral thrush; and diarrhea. Due to recurrent infections, children with SCID exhibit failure to thrive. SCID may be caused by mutations in any of several genes and can be inherited in an X-linked recessive or autosomal recessive manner. The most common type of SCID is X-linked severe combined immunodeficiency (XSCID). Another form of SCID is caused by a deficiency of the enzyme adenosine deaminase (ADA). Infections are treated with specific antibiotic, antifungal, and antiviral agents and administration of intravenous immunoglobulin. However, the most effective treatment is transplantation of blood-forming stem cells from the bone marrow of a healthy person.

For more information about SCID and other rare autoimmune disorder, visit https://checkrare.com/diseases/autoimmune-auto-inflammatory-disorders/