STAT1 and hyperinsulinemic hypoglycemia, familial, 4: In patients diagnosed with autosomal recessive (AR) complete IFN-γ receptor 1 or 2 deficiency (or AR STAT1 deficiency) or SCID with available matched donors, allogenic hematopoietic stem cell transplantation (HSCT) can be a curative option [4, 11].