saudigastro.com/patients/intestinal-lymphangiectasia
Category
Chronic
Red flags
5
This article is educational and does not replace your doctor's advice. Seek urgent care for any red-flag symptoms.
What is it?
Lymph vessels are tiny channels that carry a milky fluid called lymph, which includes fats absorbed from food and immune cells. In intestinal lymphangiectasia (the word means widening of the lymph vessels), these vessels in the gut wall are enlarged and leak lymph into the bowel. The body therefore loses protein, fats, fat-soluble vitamins and some immune cells. This is called protein-losing enteropathy (a disease of the gut that causes protein loss). It may be present from birth (primary) or develop because of another illness that blocks lymph flow (secondary).
How common is it?
It is rare. It can be diagnosed in children and young people, but also in adults. Because the symptoms are non-specific, the diagnosis can be delayed.
Why does it happen?
In the primary form, the lymph vessels are abnormally formed, often for reasons that are not fully understood. Secondary forms can follow conditions that raise pressure in or block the lymph system, such as some heart conditions (for example constrictive pericarditis or after certain heart surgeries), liver disease with raised pressure, some infections, inflammatory conditions, and some tumours such as lymphoma. Your doctor will look for an underlying cause because treating it may improve the condition.
Symptoms
- Swelling of the legs, ankles, face or belly (fluid build-up) caused by low blood protein
- Diarrhea, often fatty and pale (steatorrhea)
- Belly pain, bloating, nausea or vomiting
- Tiredness and weight loss or poor growth in children
- Frequent infections because of low immune cells
- Muscle cramps or tingling from low calcium or other nutrients
Red flags — seek urgent medical care
Rapid swelling of the legs or belly with shortness of breath
Fluid may be collecting around the lungs or heart. Seek urgent medical care.
Fever with chills or signs of serious infection
Low immune cells make infections more dangerous. See a doctor urgently.
Severe belly pain or repeated vomiting
Could be another complication. Go to the emergency department.
Muscle spasms, numbness around the mouth or fits
Possible severe low calcium. This needs urgent treatment.
A child who is not growing, very unwell, or refusing to feed
A child needing urgent care should be seen immediately; do not wait for the next appointment.
How is it diagnosed?
Blood tests often show low protein (albumin), low immune cells (lymphocytes) and sometimes low cholesterol or calcium. Stool tests that measure protein loss, such as alpha-1 antitrypsin clearance, support the diagnosis. Upper endoscopy with small biopsies (tiny tissue samples) from the small bowel may show enlarged lymph vessels. Capsule endoscopy, imaging, and tests of the heart, liver and lymph glands are used to look for a cause. Other conditions that also cause protein loss need to be excluded.
What the latest science says
Because the condition is rare, most advice comes from case series and expert experience rather than large trials. A strict low-fat diet with a special type of fat called medium-chain triglycerides is the mainstay. Research is ongoing into newer medicines and imaging methods for lymph vessels, but these are not routine yet.
Outlook — what to expect
Many people improve with diet and treatment of the cause, although the condition is often long-term and needs lifelong follow-up. Symptoms may come and go. Outlook depends on the underlying cause, so your specialist can give a view that fits you.
Treatment
Habits & Lifestyle
Long-term follow-up and consistency with the diet make the biggest difference.
- Attend regular check-ups with blood tests for protein, calcium, vitamins and blood counts.
- Weigh yourself regularly and notice leg or belly swelling, and report changes.
- Wash hands and take infection precautions, as your immune defences may be lower.
- Ask your doctor which vaccines are recommended for you before receiving any, especially live vaccines.
- Do not stop the special diet without advice, even if you feel better.
Diet
Diet is the main treatment. The aim is to cut the amount of long-chain fat that enters the lymph vessels while keeping enough calories and protein. A dietitian experienced in this condition should guide you.
- Follow a very low-fat diet for long-chain fats as set by your dietitian.
- Medium-chain triglyceride (MCT) products can add calories because they are absorbed in a different way; use them only as advised.
- Eat enough protein; high-protein, low-fat foods are usually encouraged.
- Fat-soluble vitamins (A, D, E, K) and calcium often need supplementing; your doctor will advise.
- Read food labels and check fat content, and avoid frying with ordinary oils and ghee unless your dietitian says it is allowed.
Medications
There is no single cure by medicine. Medicines are used to treat the cause, replace what is lost and control complications. Your doctor decides what suits you.
- Vitamin and mineral supplements to correct deficiencies.
- Treatment for the underlying cause (for example heart, infection or inflammatory disease).
- Diuretics (water tablets) may be used for swelling in some people.
- Some specialists use other medicines in difficult cases. Discuss options, benefits and risks.
Procedures & Surgery
Procedures are not needed for most people but may be considered when a clear, limited area is responsible.
- Endoscopy with biopsy is used to confirm the diagnosis.
- If a short segment of bowel is the only affected part, surgery to remove it may be considered by a specialist team.
- Procedures on the heart or lymph system may be needed if they are the cause.
- Tubes or fluid drainage may be needed in severe fluid build-up.
Living with the condition
- A dietitian who knows this condition is one of the most important members of your team.
- Plan meals ahead for travel and social events so you can follow your diet.
- Share information with family doctors and emergency teams about your condition.
In the Saudi context
Traditional dishes cooked with ghee, cream or fried foods can be high in fat. Ask your dietitian to help adapt family meals and gatherings so you can still share them, and ask whether fasting in Ramadan is safe for you.
Questions to ask your doctor
Save this list or print it before your appointment — doctors appreciate prepared patients.
- What is causing the lymph leak in my case?
- Can you refer me to a dietitian for a low-fat plan?
- Which vitamins and minerals should I take?
- How often will I need blood tests?
- Which vaccines are safe for me?
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Status: Approved for publication by SGA; individual clinician review is ongoing · Published 24/04/2026
For general education only; it does not replace your doctor’s advice. Individual clinician review of this guide is ongoing. SGA clinician? Review this guide