| A rare genetic primary immunodeficiency disorder with characteristics of increased susceptibility to recurrent life-threatening bacterial infections in association with typically severe neutropenia in peripheral blood and bone marrow and a prominent ectatic superficial vein pattern, resulting from recessively inherited mutations in the G6PC3 gene. Cardiac malformations (for example atrial septal defects, patent ductus arteriosus, valvular defects), urogenital anomalies (including cryptorchidism), growth and developmental delay, facial dysmorphism (for example frontal bossing, upturned nose, malar hypoplasia), and intermittent thrombocytopenia are frequently associated. |