RAC2 loss-of-function mutation in 2 siblings with characteristics of common variable immunodeficiency

We report the first patients with a homozygous loss of function mutation in the RAC2 gene, presenting with clinical features of common variable immunodeficiency. In addition, the patients suffered from glomerulonephritis, coagulopathy, multiple hormone deficiencies potentially on the autoimmune basis and abnormalities of neutrophil granules.