Overview
Genetic intestinal disease due to fat malabsorption is a group of rare inherited conditions in which the intestines cannot properly absorb dietary fats. This leads to a range of problems because fats are essential for energy, growth, and the absorption of important fat-soluble vitamins (A, D, E, and K). When fat is not absorbed correctly, it passes through the digestive system and is lost in the stool, causing greasy, foul-smelling diarrhea known as steatorrhea. These conditions typically appear in infancy or early childhood. Affected children may fail to grow and gain weight as expected, a condition called failure to thrive. Over time, deficiencies in fat-soluble vitamins can cause additional problems such as vision difficulties (from vitamin A deficiency), bone weakness (from vitamin D deficiency), neurological problems like poor coordination or numbness (from vitamin E deficiency), and bleeding problems (from vitamin K deficiency). Some forms of this disease group also affect blood cholesterol and lipoprotein levels. The specific conditions within this group include abetalipoproteinemia (Bassen-Kornzweig syndrome), hypobetalipoproteinemia, chylomicron retention disease (Anderson disease), and other disorders affecting fat transport proteins. Treatment focuses on dietary management, including a low-fat diet supplemented with medium-chain triglycerides (MCTs) that are absorbed differently, along with high-dose fat-soluble vitamin supplementation. Early diagnosis and consistent treatment can significantly improve outcomes and prevent many of the serious complications associated with vitamin deficiencies.
Key symptoms:
Greasy, foul-smelling stools (steatorrhea)Chronic diarrheaFailure to thrive or poor weight gain in infantsBloating and abdominal distensionPoor growth in childrenVision problems, especially night blindnessNumbness or tingling in hands and feetPoor balance and coordinationEasy bruising or prolonged bleedingMuscle weaknessFatigue and low energyBone weakness or fracturesAbnormally low cholesterol levelsAnemiaDevelopmental delays in severe cases
Variable
Can be inherited in different ways depending on the underlying gene
Infantile
Begins in infancy, roughly 1 month to 2 years old
Treatments
No FDA-approved treatments are currently listed for Genetic intestinal disease due to fat malabsorption.
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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 Genetic intestinal disease due to fat malabsorption.
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
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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.What specific type of fat malabsorption disorder does my child have, and which gene is affected?,What are the target blood levels for fat-soluble vitamins, and how often should they be checked?,What is the recommended daily dose of each fat-soluble vitamin supplement?,Should we use water-soluble forms of vitamins for better absorption?,How much dietary fat is safe, and can you refer us to a dietitian experienced with this condition?,What neurological and eye exams should be done regularly, and how often?,Are there any clinical trials or new treatments being studied for this condition?
Common questions about Genetic intestinal disease due to fat malabsorption
What is Genetic intestinal disease due to fat malabsorption?
Genetic intestinal disease due to fat malabsorption is a group of rare inherited conditions in which the intestines cannot properly absorb dietary fats. This leads to a range of problems because fats are essential for energy, growth, and the absorption of important fat-soluble vitamins (A, D, E, and K). When fat is not absorbed correctly, it passes through the digestive system and is lost in the stool, causing greasy, foul-smelling diarrhea known as steatorrhea. These conditions typically appear in infancy or early childhood. Affected children may fail to grow and gain weight as expected, a c
At what age does Genetic intestinal disease due to fat malabsorption typically begin?
Typical onset of Genetic intestinal disease due to fat malabsorption is infantile. Age of onset can vary across affected individuals.