Overview
Generalized galactose epimerase deficiency, also known as generalized UDP-galactose-4-epimerase (GALE) deficiency or type III galactosemia, is a rare inherited metabolic disorder. It is the most severe form of epimerase deficiency galactosemia. In this condition, the body cannot properly process the sugar galactose because of a missing or poorly functioning enzyme called UDP-galactose-4-epimerase. This enzyme is needed in every cell of the body to convert one form of sugar into another, which is essential for normal cell function. Babies with this condition typically become very sick in the first days to weeks of life after they start drinking breast milk or formula containing galactose or lactose. Symptoms can include poor feeding, vomiting, weight loss, jaundice (yellowing of the skin and eyes), an enlarged liver, cataracts, low muscle tone, and developmental delays. Without treatment, the disease can cause serious liver damage, kidney problems, brain damage, and can be life-threatening. Treatment centers on a galactose-restricted diet, which means avoiding milk and dairy products and other foods high in galactose. However, because the body also needs small amounts of galactose for normal cell processes and the enzyme is involved in making galactose from other sugars internally, dietary management is complex and must be carefully supervised by metabolic specialists. Even with strict dietary treatment, some patients may still experience long-term complications such as learning difficulties, speech delays, and growth problems. Early diagnosis through newborn screening and prompt dietary intervention offer the best chance for improved outcomes.
Also known as:
Key symptoms:
Poor feeding in newbornsVomitingFailure to gain weight or grow properlyJaundice (yellowing of skin and eyes)Enlarged liverCataracts (clouding of the eye lens)Low muscle tone (floppiness)Developmental delaysIntellectual disabilitySpeech and language delaysHearing lossKidney problemsLiver damageIncreased susceptibility to infectionsLethargy or extreme tiredness
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Neonatal
Begins at or shortly after birth (first 4 weeks)
Treatments
No FDA-approved treatments are currently listed for Generalized galactose epimerase deficiency.
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Specialists
View all specialists →No specialists are currently listed for Generalized galactose epimerase deficiency.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Generalized galactose epimerase deficiency.
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Caregiver Resources
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Social Security Disability
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Questions for your doctor
Bring these to your next appointment
- Q1.How much galactose should my child's diet contain, and how do we determine the right amount?,What specific foods and ingredients do we need to avoid, and are there hidden sources of galactose we should watch for?,How often should blood levels of galactose-1-phosphate be monitored?,What developmental milestones should we watch for, and when should we seek early intervention services?,Are there any long-term complications we should be screening for, such as cataracts, hearing loss, or ovarian problems?,Is genetic counseling available for our family, and what are the chances of having another affected child?,Are there any clinical trials or new research studies that my child might be eligible for?
Common questions about Generalized galactose epimerase deficiency
What is Generalized galactose epimerase deficiency?
Generalized galactose epimerase deficiency, also known as generalized UDP-galactose-4-epimerase (GALE) deficiency or type III galactosemia, is a rare inherited metabolic disorder. It is the most severe form of epimerase deficiency galactosemia. In this condition, the body cannot properly process the sugar galactose because of a missing or poorly functioning enzyme called UDP-galactose-4-epimerase. This enzyme is needed in every cell of the body to convert one form of sugar into another, which is essential for normal cell function. Babies with this condition typically become very sick in the f
How is Generalized galactose epimerase deficiency inherited?
Generalized galactose epimerase deficiency follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Generalized galactose epimerase deficiency typically begin?
Typical onset of Generalized galactose epimerase deficiency is neonatal. Age of onset can vary across affected individuals.