IRF8 & GATA2 deficiencies, reticular dysgenesis, WHIM syndrome, bare lymphocyte syndrome, Wiskott-Aldrich syndrome, CD40/CD40L deficiency, Pitt-Hopkins Syndrome, hyper-IgE syndrome, and IRF7 mutations. The gene discussed is IRF8; the disease is hyperinsulinemic hypoglycemia, familial, 4.