WAS: X-linked disorder with immunodeficiency, eczema and thrombocytopenia. WIP: autosomal recessive immunodeficiency with mutations in the WIPF1 gene. Patients display a WAS-like phenotype. ARPC1B: autosomal recessive CID with immune dysregulation and platelet abnormalities. Here, WIPF1 is linked to Wiskott-Aldrich syndrome.