Cryopyrin-associated periodic syndrome synonyms

Cryopyrin-associated periodic syndrome (CAPS) is a spectrum of autoinflammatory disorders historically categorized into three distinct clinical phenotypes: Familial Cold Autoinflammatory Syndrome (FCAS), Muckle-Wells Syndrome (MWS), and Neonatal-Onset Multisystem Inflammatory Disease (NOMID), also known as Chronic Infantile Neurological Cutaneous Articular (CINCA) syndrome. While these names appear frequently in medical literature, they are now unified under the umbrella term CAPS to reflect their shared genetic origin in the NLRP3 gene.

Why does Cryopyrin-associated periodic syndrome have so many names?

The naming of Cryopyrin-associated periodic syndrome reflects a historical evolution in medical understanding. In the past, clinicians identified three separate diseases based on varying levels of severity: FCAS (the mildest form), MWS (an intermediate form), and NOMID/CINCA (the most severe form). As medical researchers identified that all three conditions are caused by gain-of-function mutations in the NLRP3 gene—which encodes the protein cryopyrin—the medical community adopted the term Cryopyrin-associated periodic syndrome to signify that these are points on a single clinical spectrum rather than distinct entities. Today, clinicians use the umbrella term CAPS to facilitate clearer communication and research.

What are the primary synonyms and historical names for this condition?

Patients and caregivers may encounter several different terms in older medical records or international clinical literature. Understanding these synonyms is essential for navigating your health journey. The following terms are commonly used to describe the clinical manifestations of Cryopyrin-associated periodic syndrome:

• FCAS: Familial Cold Autoinflammatory Syndrome (formerly known as Familial Cold Urticaria).


• MWS: Muckle-Wells Syndrome.


• NOMID: Neonatal-Onset Multisystem Inflammatory Disease.


• CINCA: Chronic Infantile Neurological Cutaneous Articular syndrome (this is the European synonym for NOMID).


• NLRP3-AID: NLRP3-associated autoinflammatory disease (a modern, genetically precise nomenclature).

How is Cryopyrin-associated periodic syndrome classified officially?

In international medical classification systems, Cryopyrin-associated periodic syndrome is indexed to ensure standardized care. Orphanet classifies the condition under the identifier ORPHA:199321. In the Online Mendelian Inheritance in Man (OMIM) database, the spectrum is associated with the NLRP3 gene (OMIM #606416). While ICD-10 and ICD-11 codes are evolving, the condition is typically coded under autoinflammatory syndromes or periodic fever syndromes. Our community at DiseaseMaps.org currently supports 32 people with Cryopyrin-associated periodic syndrome, many of whom have encountered these various labels during their diagnostic journey.

Which terminology should patients use when speaking with doctors?

While the specific names like Muckle-Wells or NOMID are still useful for describing the severity of symptoms, the preferred professional term is Cryopyrin-associated periodic syndrome. Using the term CAPS helps your medical team understand that you are referring to the entire spectrum of NLRP3-related disease. If you are communicating with specialists, mentioning the specific NLRP3 mutation found in your genetic testing is often more clinically relevant than the historical clinical name.

Next steps

• Consult a specialist: Seek care from a rheumatologist or immunologist who specializes in autoinflammatory diseases.


• Verify your genetics: Ensure you have a formal genetic report confirming your NLRP3 mutation to guide treatment options.


• Join the community: Connect with others at DiseaseMaps.org to share experiences regarding symptom management and navigation of these various disease names.


• Stay informed: Review the latest literature on IL-1 inhibitor therapies, which have revolutionized the management of CAPS.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.

References

• Orphanet: Cryopyrin-associated periodic syndrome (ORPHA:199321).


• NIH Genetic and Rare Diseases (GARD) Information Center: Cryopyrin-associated periodic syndrome.


• OMIM: NLRP3-associated autoinflammatory disease (Entry #606416).


• The Autoinflammatory Alliance: Patient resources for CAPS/NLRP3-AID.