NCIt related terms : PIK3R1-Associated Immunodeficiency;
NCIt definition : An autosomal dominant condition caused by mutation(s) in the PIK3R1 gene, encoding
phosphatidylinositol 3-kinase regulatory subunit alpha. It is characterized by a heterogenous
phenotype, including recurrent respiratory infections, lymphoproliferation, and antibody
deficiency. There is an increased likelihood of development of B-cell lymphoma.;