ORPHA:619953
Familial hyperinflammatory lymphoproliferative immunodeficiency
Also known as: HEM1 deficiency syndrome · NCKAP1L-associated hyperinflammatory disorder
Clinical definition (Orphanet)
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, , and lymphoproliferation. Cytokine overproduction, antibody abnormalities, elevated IgE levels and increased B cells are observed.
How rare: <1 / 1 000 000 — fewer than one in a million. In a city the size of Kolkata, that might mean on the order of fifteen people.
Is anyone studying this?
0
We found no papers under this exact name — work may still exist under another label.
0 in the last 10 years · low confidence
Is a treatment being tested?
0
trials for this specific condition
No interventional trial testing a treatment matched this specific condition name on ClinicalTrials.gov (observational studies and pan-disease registries are listed separately when present).
Data as of 26 July 2026
No matched interventional trials. This is true for 59.2% of diseases in the trials denominator (151 of 255). Here are the researchers publishing on it.
low confidence
Do we know what causes it?
Not yet — the cause hasn't been pinned down in GenCC.
No strong gene–disease assertion joined for this Orphanet entity.
Who's working on it?
0
Distinct author names in 0 sampled papers.
Who's working on it?
No author names could be extracted from the sampled publications. Try the Europe PMC query in “How we counted this,” or contact an umbrella rare-disease organisation for researcher referrals.
Recruiting interventional trials
Trials testing a treatment from the matched ClinicalTrials.gov set
No interventional trial testing a treatment was found for this specific condition name on ClinicalTrials.gov.
See who's working on it above — people publishing on this disease are often the practical next contact when no trial is listed.
Where to find support
We do not yet link condition-specific patient organisations. These umbrella groups support undiagnosed and ultra-rare families:
India — NPRD
Last verified 2026-07-26This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.
Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.
How we counted this
Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored below but are not added to the query string.
"Familial hyperinflammatory lymphoproliferative immunodeficiency" OR "HEM1 deficiency syndrome" OR "NCKAP1L-associated hyperinflammatory disorder"
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Familial hyperinflammatory lymphoproliferative immunodeficiency" OR "HEM1 deficiency syndrome" OR "NCKAP1L-associated hyperinflammatory disorder" OR "immunodeficiency-associated lymphoproliferative disease"
Study-type breakdown: 0 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.
Cross-references (from Mondo): UMLS:C5680415
Query health: broken — strategies attempted: phrase, recall-expansion; with hits: none
Run this search on ClinicalTrials.gov
Confidence reasoning
- Preferred label is multi-word and distinctive
- No synonyms dropped by stoplist
- No label/synonym collisions with other diseases in this corpus
- Zero publications but parent term neoplasm has 2267988 — literature likely indexed under a broader name