Short answer · Medically reviewed summary · Last updated: 2026-05-08
Hyper-IgD Syndrome (HIDS), also known as mevalonate kinase deficiency (MKD), is a rare autoinflammatory disorder characterized by lifelong recurrent fevers starting in early childhood, often accompanied by abdominal pain, joint inflammation, and skin rashes. A diagnosis is confirmed through genetic testing for mutations in the MVK gene and blood tests showing elevated levels of immunoglobulin D (IgD) and mevalonic acid. What are the primary symptoms of Hyper-IgD Syndrome? HIDS typically manifests with fever episodes lasting 3 to 7 days, often triggered by stress, trauma, or vaccinations.
How do I know if I have Hyper-IgD Syndrome / Hyperimmunoglobulinemia D With Recurrent Fever (HIDS)?
Could you have Hyper-IgD Syndrome / Hyperimmunoglobulinemia D With Recurrent Fever (HIDS)? Early signs that prompted real patients to seek diagnosis, plus medically reviewed guidance.
Hyper-IgD Syndrome (HIDS), also known as mevalonate kinase deficiency (MKD), is a rare autoinflammatory disorder characterized by lifelong recurrent fevers starting in early childhood, often accompanied by abdominal pain, joint inflammation, and skin rashes. A diagnosis is confirmed through genetic testing for mutations in the MVK gene and blood tests showing elevated levels of immunoglobulin D (IgD) and mevalonic acid.
What are the primary symptoms of Hyper-IgD Syndrome?
HIDS typically manifests with fever episodes lasting 3 to 7 days, often triggered by stress, trauma, or vaccinations. Because Hyper-IgD Syndrome is an autoinflammatory condition, patients frequently report systemic inflammation. Common clinical features include:
- Recurrent high fevers (often >39°C/102°F)
- Painful, swollen lymph nodes in the neck
- Abdominal pain, vomiting, or diarrhea
- Joint pain (arthralgia) or swelling (arthritis)
- Skin rashes (maculopapular, urticarial, or nodular)
How is Hyper-IgD Syndrome diagnosed?
If you suspect you have Hyper-IgD Syndrome, keep a detailed symptom diary to show your physician. Diagnosis involves a clinical evaluation by a rheumatologist or immunologist, followed by:
- Measurement of serum IgD levels (though these can be normal in some patients).
- Analysis of urinary mevalonic acid during a fever flare.
- Molecular genetic testing to identify biallelic mutations in the MVK gene.
When should I seek urgent medical care?
While HIDS is chronic, certain red flags necessitate immediate evaluation. Seek emergency care if you experience severe abdominal distress, signs of systemic infection, or neurological changes. Because 6 members of the DiseaseMaps community have shared their HIDS journey, we know that recognizing patterns early is vital for managing long-term health and preventing complications like amyloidosis.
How can I advocate for myself?
If your concerns are dismissed, request a referral to a center specializing in periodic fever syndromes or autoinflammatory diseases. Bring printed literature from reputable sources to your appointment. Remember, you are the expert on your own body; if symptoms persist, do not hesitate to seek a second opinion from a specialist familiar with Hyper-IgD Syndrome.
Next steps
- Consult a pediatric or adult rheumatologist specializing in autoinflammatory diseases.
- Maintain a fever and symptom log to identify potential triggers for your Hyper-IgD Syndrome flares.
- Join the DiseaseMaps.org community to connect with others living with Hyper-IgD Syndrome.
Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Hyper-IgD Syndrome
- Orphanet: Mevalonate kinase deficiency
- OMIM (Online Mendelian Inheritance in Man): MVK gene entry
- Autoinflammatory Alliance: Patient resources for HIDS/MKD
