Niemann-Pick Disease: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Niemann-Pick Disease?
A medical geneticist, a doctor who diagnoses and manages inherited conditions, often leads care for Niemann-Pick disease. A neurologist, a doctor for the brain and nerves, helps when the nervous system is affected. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is Niemann-Pick disease?
Niemann-Pick disease is a group of diseases passed down through families. Fatty substances called lipids collect in the cells of the spleen, liver, and brain. Doctors describe it as type A, type B, and type C. Type C is split into C1 and C2, which differ only in their genetic cause.
Symptoms
Symptoms vary, and a person may never have all of them.
Type A usually begins in the first few months of life. Symptoms may include:
- Belly swelling by 3 to 6 months of age.
- A cherry red spot at the back of the eye, on the retina.
- Feeding difficulties.
- Loss of early motor skills, which gets worse over time.
Type B symptoms are usually milder and occur in late childhood or the teenage years. Belly swelling may occur in young children, and some children may have repeated respiratory infections. There is almost no brain and nervous system involvement.
Type C usually affects school-age children, but it may occur any time from early infancy to adulthood. Symptoms may include:
- Trouble moving the limbs, which may cause an unsteady walk or clumsiness.
- An enlarged spleen and an enlarged liver.
- Jaundice, a yellow color of the skin, at or shortly after birth.
- Learning difficulties and a decline in thinking skills.
- Seizures.
- Slurred, irregular speech.
- Sudden loss of muscle tone, which may lead to falls.
- Trouble moving the eyes up and down.
Causes and who gets it
Types A and B are caused by changes in the SMPD1 gene. This gene makes an enzyme called acid sphingomyelinase. Without enough of this enzyme, a fat called sphingomyelin builds up inside cells.
Type C is caused by changes in either the NPC1 gene or the NPC2 gene. These genes help move lipids within cells, so cholesterol and other lipids build up when they do not work.
All types are autosomal recessive. This means both parents are carriers. Each parent has one copy of the changed gene and has no signs of the disease. Type A occurs in all races and ethnicities, but it is more common in the Ashkenazi (Eastern European) Jewish population.
How doctors diagnose it
A blood or bone marrow test can be done to diagnose types A and B. A skin biopsy is usually done to diagnose type C. A technician watches how the skin cells grow, move, and store cholesterol. DNA tests may also be done to look for the 2 genes that cause this type of the disease.
Treatment
- Type A: there is no effective treatment for the nerve symptoms at this time. Olipudase alfa, an enzyme replacement medicine, was approved by the FDA in 2022 to treat symptoms outside the brain and nervous system.
- Type B: bone marrow transplants may be tried. Olipudase alfa is also approved by the FDA for symptoms outside the brain and nervous system.
- Type C: a medicine called miglustat is available for the nervous system symptoms.
- In 2024, the FDA approved arimoclomol (Miplyffa) with miglustat for nerve symptoms of type C. It is for adults and children 2 years of age and older.
- In 2024, the FDA also approved levacetylleucine (Aqneursa) for the nerve symptoms of type C in adults and children who weigh at least 15 kilograms (about 33 pounds).
Medicines are available to relieve many symptoms, such as sudden loss of muscle tone and seizures. Care for type C may need a team of specialists, including pediatricians, neurologists, eye doctors, lung doctors, and stomach and bowel doctors.
When to see a doctor
Call 911 or go to the emergency room if a child has a seizure, trouble or abnormal breathing, or loses consciousness. Contact your child's provider if your child has developmental problems, feeding problems, or poor weight gain. Make an appointment with your provider if you have a family history of Niemann-Pick disease and plan to have children. Genetic counseling and screening is recommended.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Such a doctor can help with an evaluation and checkups. The doctor can also help coordinate care between specialists and genetic counselors.
Common questions
Is Niemann-Pick disease life threatening?
Yes, it can be, depending on the type. Children with type A generally do not survive past early childhood. People with type B usually survive into adulthood, and people with type C may survive into adulthood.
Is Niemann-Pick disease inherited?
Yes, all types of Niemann-Pick disease are inherited in an autosomal recessive pattern. Both parents must be carriers. Each has one copy of the changed gene and has no signs of the disease.
Is there a treatment for Niemann-Pick disease?
Yes, some treatments exist. The FDA has approved olipudase alfa for symptoms outside the brain and nervous system in types A and B. For type C, medicines such as miglustat, arimoclomol, and levacetylleucine are used for nerve symptoms. There is no effective treatment at this time for the nerve symptoms of type A.
Can families get genetic counseling for Niemann-Pick disease?
Yes, genetic counseling and screening is recommended for people with a family history who plan to have children.
Sources
- MedlinePlus - Niemann-Pick disease
- MedlinePlus Genetics - Niemann-Pick disease
- NORD (National Organization for Rare Disorders) - Niemann-Pick Disease Type C
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.
