XLA, CVID, CGD, SIgAD, CID, complement deficiency, PAD, X‐linked HIGM, WAS, NEMO deficiency, defects of antigen presentation, ADA deficiency, pulmonary alveolar proteinosis (due to CSF2RA and GATA2 deficiency), AT, NBS, PLAID, reduced serum Ig G2 level. Here, GATA2 is linked to combined immunodeficiency.