Zellweger Syndrome: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Zellweger Syndrome?
A gastroenterologist often helps with feeding and liver problems, and a neurologist and medical geneticist may also join the team. A primary care doctor helps coordinate care. 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 Zellweger syndrome?
Zellweger syndrome is a rare disease that a baby is born with. It affects how the body breaks down certain fats and other substances. Babies with this condition often have serious problems in the brain, liver, and other organs. It is the most severe form of a group of conditions called Zellweger spectrum disorders.
Zellweger syndrome is a genetic condition. Tiny cell parts called peroxisomes do not form properly. When they fail, fatty substances and harmful waste build up and damage organs, especially the brain and liver.
Symptoms
Symptoms usually show up at birth or in the first weeks of life:
- Poor muscle tone, with a weak or floppy body
- Trouble feeding and poor weight gain
- Seizures
- A large or soft spot on the head
- Yellowing of the skin and eyes, a sign of liver problems
- Vision and hearing problems
Causes and who gets it
Zellweger syndrome is caused by changes in one of several genes, most often PEX1. A baby must inherit a changed copy from both parents; carriers usually have no symptoms. It is very rare, occurring in roughly one in 50,000 to one in 100,000 births.
How doctors diagnose it
Doctors often suspect Zellweger syndrome based on symptoms and a physical exam. Blood and urine tests and genetic testing can confirm the diagnosis.
Treatment
There is no cure. Treatment focuses on easing symptoms and keeping the baby comfortable, often with many specialists working together. Care may include seizure medicines, feeding support, physical therapy, and hearing or vision support.
When to see a doctor
Parents should talk to a doctor right away if a newborn has very poor muscle tone, trouble feeding, seizures, or yellowing of the skin and eyes.
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. Either kind can manage routine care and coordinate with specialists. A directory like FindMyDirectDoctor.com can help families find this kind of support.
Common questions
How long do babies with Zellweger syndrome usually live?
Many babies with Zellweger syndrome live only a few months. Some live into childhood or beyond. Lifespan varies a lot from child to child. A child's care team can give the most accurate picture for their situation.
Can Zellweger syndrome be prevented?
There is no way to prevent the gene change that causes it. Families with a history of the condition can meet with a genetic counselor before pregnancy. They can learn about their chances and about testing options.
Is there a difference between Zellweger syndrome and other Zellweger spectrum disorders?
Yes. Zellweger syndrome is the most severe form. Other forms on the spectrum are milder and may appear later in childhood. All of them involve peroxisomes that do not work properly.
Can other children in the family have it?
If both parents carry one changed copy of the gene, each pregnancy has a one in four chance of being affected. Genetic testing can tell parents whether they are carriers.
Sources
- NIH Genetic and Rare Diseases Information Center - Zellweger spectrum disorders
- MedlinePlus - Zellweger spectrum disorder: MedlinePlus Genetics
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.
