Nakajo Nishimura Syndrome: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Nakajo Nishimura Syndrome?
A primary care doctor, such as a family doctor or pediatrician, is usually the first to notice signs and order tests. Because the condition is rare and can affect many organs, a geneticist often confirms the diagnosis. Rheumatologists and cardiologists may also join the care team, with the primary care doctor coordinating everything.
What it is
Nakajo Nishimura syndrome is a very rare genetic disease, passed down through families in the genes. It causes periods of fever and slow breakdown of fat and muscle tissue in parts of the body. Doctors sometimes group it with lipodystrophy syndromes, which involve loss of body fat in unusual patterns.
Symptoms
Symptoms usually begin in infancy or early childhood. A common early sign is repeated fevers without a clear infection, called periodic fever. Many children also develop a frostbite-like rash on the fingers, toes, ears, or nose. Over time, people lose fat under the skin in the face, upper body, and arms, while fat may build up in the liver. Muscle weakness, hearing loss, and heart, liver, or joint problems can develop.
Causes and who gets it
The condition is caused by mutations in a gene known as PSMB8. It appears only when a child inherits one changed copy from each parent, a pattern called autosomal recessive inheritance. Carriers with one changed copy usually have no symptoms. It is more common in Japan, where it was first described, but can occur in anyone.
How doctors diagnose it
Doctors start with a medical history and physical exam, looking for the pattern of fevers, rash, and fat loss. Blood tests can show inflammation or anemia. A genetic test can confirm the diagnosis, and doctors may order imaging scans or a biopsy.
Treatment
There is no cure. Treatment eases symptoms and protects the organs. Medicines that calm inflammation, such as biologic drugs, are often used for fevers and rashes. Care includes monitoring the heart, liver, and joints; physical therapy may help with muscle weakness.
When to see a doctor
Talk to a doctor if a child has repeated fevers with no clear cause, or a frostbite-like rash on the fingers, toes, ears, or nose. Seek care for unexplained swelling, muscle weakness, or unusual changes in body fat. Early evaluation helps doctors start supportive care sooner.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance; a concierge doctor usually charges more and often works alongside insurance. Either can spend extra time tracking fevers, rashes, and organ health, manage routine monitoring, and coordinate with specialists.
Common questions
Is Nakajo Nishimura syndrome contagious?
No. It is a genetic condition that a person is born with. It cannot spread from person to person.
Can adults develop it?
Symptoms usually start in infancy or childhood. Adults who notice similar signs should see a doctor. Other conditions can look alike and need different care.
Will my children inherit it?
A child must inherit one changed copy of the gene from each parent to have the condition. People who are planning a family and have a family history can speak with a genetic counselor. That is a trained expert who explains inheritance and testing options.
Can it be cured?
There is no cure today. Treatment can ease symptoms and protect organs. How well a person does varies from person to person.
Sources
- NIH Genetic and Rare Diseases Information Center - Proteosome-associated autoinflammatory syndrome
- MedlinePlus Genetics - Nakajo-Nishimura syndrome
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
