Periodic fever-infantile…

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Periodic fever-infantile enterocolitis-autoinflammatory syndrome

ORPHA:436166Disease

Also called NLRC4-related autoinflammatory syndrome with macrophage activation syndrome · NLRC4-related infantile enterocolitis-autoinflammatory syndrome · NLRC4-related macrophage activation syndrome · NLRC4-related MAS · NLRC4-related autoinflammatory syndrome with MAS

What it is

A rare genetic systemic or rheumatologic disease characterized by neonatal or infantile onset of enterocolitis (which resolves with age), periodic fever, and episodes of severe systemic inflammation, which may be precipitated by infections, stress, or fatigue. Signs and symptoms include splenomegaly, urticaria-like rashes, arthralgia, and myalgia. Associated laboratory findings are elevated inflammatory markers (such as ferritin, C-reactive protein), pancytopenia, and elevated transaminases. If left untreated, flares can progress to coagulopathy, organ failure, and death.

Key facts

Prevalence
<1 / 1 000 000
Age of onset
Neonatal
Inheritance
Autosomal dominant
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

NLRC4Disease-causing germline mutation(s) (gain of function)

ICD-10 codes

E85.0filed under a broader ICD-10 category — shared with 14 other rare diseases

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

MONDO 0014472OMIM 616050UMLS C4015067

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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