L 2 Hydroxyglutaric Aciduria: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats L 2 Hydroxyglutaric Aciduria?
A primary care doctor, such as a family doctor or pediatrician, is often the first doctor a family sees and can order early tests. Most patients are also cared for by a neurologist, who treats brain and nervous system problems, and sometimes a geneticist, who specializes in inherited conditions.
What it is
L 2 hydroxyglutaric aciduria is a rare inherited condition that affects how the body breaks down a substance made during normal energy production in cells. People with this condition lack enough of a working enzyme, so L 2 hydroxyglutaric acid builds up in the blood, urine, and brain, harming the brain and nervous system over time.
Symptoms
Symptoms usually appear in childhood, though they can be mild at first. Many children show delays in milestones like walking or talking. Other signs include seizures, balance and coordination problems, a larger than normal head size, learning difficulties, and muscle stiffness, which often worsen slowly over many years.
Causes and who gets it
This condition is genetic, passed down through families. A child must receive one changed copy of a gene called L2HGDH from each parent; parents with only one changed copy usually have no symptoms. It is very rare and affects boys and girls equally.
How doctors diagnose it
Doctors start by asking about symptoms and family history. A urine test can show high levels of L 2 hydroxyglutaric acid, a strong clue. Genetic testing can confirm the diagnosis, and an MRI often shows changes in certain brain areas.
Treatment
There is no cure, and treatment focuses on managing symptoms. Seizures are often treated with medicines that reduce abnormal brain activity. Physical therapy can help with movement and balance, and speech therapy can help with communication.
When to see a doctor
Talk to a doctor if a child has unexplained developmental delays, seizures, trouble with balance, or a larger than expected head size. Sudden changes, such as new or worsening seizures, need prompt medical attention.
How a direct primary care or concierge doctor fits in
A direct primary care doctor is paid with a flat monthly fee instead of billing insurance for each visit, while a concierge doctor charges more and often works alongside insurance. Both usually have smaller patient lists, which can mean longer visits and easier access. Such a doctor can coordinate testing and follow-ups and refer to specialists when needed.
Common questions
Is L-2-hydroxyglutaric aciduria the same as the D form?
No. The L form and the D form are separate rare conditions caused by different genes. The L form is the more common of the two, though both are very rare.
Can it be diagnosed in adults?
Yes, though most people show signs in childhood. Some people have mild symptoms and are not diagnosed until later in life.
Is there a link to brain tumors?
Some studies have found a link between this condition and certain brain tumors. Doctors may recommend regular brain imaging to watch for changes.
Can L-2-hydroxyglutaric aciduria be prevented?
There is no way to prevent an inherited condition like this one. Families with a history of the condition can speak with a genetic counselor before having children. A genetic counselor is a trained expert who explains inherited disease risks.
Sources
- NIH Genetic and Rare Diseases Information Center - L-2-hydroxyglutaric aciduria
- MedlinePlus - 2-hydroxyglutaric aciduria: 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.
