Overview
A disorder of pentose phosphate metabolism is a rare inherited condition that affects a specific chemical pathway in the body called the pentose phosphate pathway (also known as the hexose monophosphate shunt). This pathway plays an important role in processing sugars and producing molecules that protect cells from damage. When this pathway does not work properly, the body cannot make enough of certain protective substances, and harmful byproducts can build up in cells. This group of disorders can affect many parts of the body, including the brain, red blood cells, and muscles. Because the pentose phosphate pathway helps protect red blood cells from breaking down, people with these disorders may experience episodes of anemia (low red blood cell counts). The brain is also heavily dependent on this pathway, so neurological problems such as intellectual disability, seizures, and developmental delays are common in some forms of this condition. Treatment is mostly focused on managing symptoms, since there is currently no cure. Depending on the specific enzyme affected, some patients may benefit from dietary changes, vitamin supplements, or medications to manage complications. Early diagnosis through newborn screening or genetic testing can help families access support and begin management sooner.
Key symptoms:
Intellectual disability or learning difficultiesSeizures or epilepsyDelayed development in infants and childrenAnemia (low red blood cell count causing tiredness and paleness)Enlarged liver and spleenLiver disease or liver failureMuscle weaknessPoor growth or failure to thriveAbnormal brain white matter (seen on MRI scans)Cataracts (clouding of the eye lens)Low blood sugar (hypoglycemia)Swelling in the abdomen
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for Disorder of pentose phosphate metabolism.
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Specialists
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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 Disorder of pentose phosphate metabolism.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.Which specific enzyme or gene is affected in my child's case, and how does that affect the expected symptoms and outlook?,Are there any dietary changes or supplements that could help manage this condition?,How often should we monitor liver function, blood counts, and brain development?,Is there any clinical trial or experimental treatment we should know about?,What signs should prompt us to go to the emergency room immediately?,Should other family members be tested for this condition?,What therapies or educational supports would you recommend to help with development?
Common questions about Disorder of pentose phosphate metabolism
What is Disorder of pentose phosphate metabolism?
A disorder of pentose phosphate metabolism is a rare inherited condition that affects a specific chemical pathway in the body called the pentose phosphate pathway (also known as the hexose monophosphate shunt). This pathway plays an important role in processing sugars and producing molecules that protect cells from damage. When this pathway does not work properly, the body cannot make enough of certain protective substances, and harmful byproducts can build up in cells. This group of disorders can affect many parts of the body, including the brain, red blood cells, and muscles. Because the pe
How is Disorder of pentose phosphate metabolism inherited?
Disorder of pentose phosphate metabolism follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.