Kostmann syndrome

What is Kostmann syndrome?

Kostmann syndrome is a rare, severe, congenital neutropenia disorder characterized by a lack of mature neutrophils (absolute neutrophil counts less than 500 cells/mm3) associated with frequent, recurrent bacterial infections (e.g. otitis media, pneumonia, sinusitis, urinary tract infections, abscesses of skin and/or liver) and increased promyelocytes in the bone marrow. Periodontal disease, as well as neurological symptoms, such as cognitive impairment, severe neurodegeneration and epilepsy, have been reported in some patients.

Other condition names

  • Infantile agranulocytosis
  • Severe congenital neutropenia type 3

Inheritance type

Autosomal recessive


  • Worldwide: <1 in 1,000 000
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