miércoles, 22 de julio de 2015

Wiskott-Aldrich Syndrome (WAS)

Wiskott-Aldrich Syndrome (WAS)

NIAID Banner Logo Image

T cell

A T cell.
Credit: NIAID

Wiskott-Aldrich Syndrome (WAS)

People with WAS have problems with their B cells, T cells, and platelets (blood components that aid in clotting). This can result in prolonged episodes of bleeding, recurrent bacterial and fungal infections, and increased risk of cancers and autoimmune diseases.


WAS is an X-linked recessive disease caused by mutations in the WAS gene, which provides instructions for production of Wiskott-Aldrich Syndrome Protein (WASP).

Signs and Symptoms

Mutations in the WAS gene differ from person to person, and some mutations result in more severe disease than others. Classic symptoms of WAS include the following:
  • Reduced platelet counts that lead to small bruises or bleeding in the skin, bowels, and gums or prolonged nose bleeds
  • Upper respiratory tract infections such as sinusitis
  • Lower respiratory infections and pneumonia
  • Eczema
severe eczema
People with Wiskott-Aldrich syndrome may continue to experience severe eczema when they reach adulthood.
Credit: NIAID
More severe forms of WAS can lead to the following:
  • Bloodstream infections, meningitis, and severe viral infections
  • Autoimmune-like symptoms, including blood vessel inflammation, anemia, and production of antibodies against the body’s own platelets
  • Lymphoma or leukemia


Blood tests will indicate low platelet counts in boys who show unusual bleeding or bruises; low platelet counts also can be determined using blood samples. Children with WAS fail to produce effective antibodies to bacteria and vaccines; skin tests can reveal abnormal T-cell function that leads to this failure.


Intravenous (through the vein) immunglobulin replacement therapy and iron supplements are given to children with WAS. Bone marrow transplant, which re-sets and replenishes the immune system, has been shown to be effective.

No hay comentarios:

Publicar un comentario