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Start free with EleplanFamilial hyperinflammatory lymphoproliferative immunodeficiency
ORPHA:619953Disease
Also called HEM1 deficiency syndrome · NCKAP1L-associated hyperinflammatory disorder
What it is
A rare autoinflammatory syndrome with immune deficiency characterized by recurrent infections (bacterial and viral) due to NCKAP1L mutations. Patients are present with recurrent respiratory tract infections and recurrent pneumonia mostly causing bronchiectasis, bacteremia, and meningitis. Patients also have systemic hyperinflammation which mostly presents with an atopic disease, hepatosplenomegaly, and lymphoproliferation. Cytokine overproduction, antibody abnormalities, elevated IgE levels and increased B cells are observed.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Childhood, Infancy, Neonatal
- Inheritance
- Autosomal recessive
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Gene
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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