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A rare genetic primary immunodeficiency disorder with characteristics of early-onset recurrent severe bacterial infections, granulopoiesis maturation arrest at the promyelocyte/myelocyte stage and markedly reduced absolute neutrophil counts, resulting from recessively inherited mutations in the JAGN1 gene. Mild facial dysmorphism (such as triangular face), short stature, failure to thrive, hypothyroidism, developmental delay, pancreatic insufficiency and coarctation of aorta, as well as bone and urogenital abnormalities may also be associated.
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