PIK3R1 Deficiency

**Semantic type:** Disease or Syndrome

**Definition:** A deficiency caused by mutation(s) in the PIK3R1 gene, encoding phosphatidylinositol 3-kinase regulatory subunit alpha. It is associated with autosomal recessive agammaglobulinemia 7, immunodeficiency 36 and SHORT (short stature, hyperextensibility of joints or hernia, ocular depression, Rieger anomaly, teething delay) syndrome.