Secretory diarrhea caused by mutation in EPCAM is usually called congenital tufting enteropathy or intestinal epithelial dysplasia. It is a very rare inherited disease that starts in early infancy. The bowel lining cannot work normally, so the baby loses a lot of water and salts into the stool. This causes severe watery diarrhea, dehydration, poor weight gain, and often long-term intestinal failure. In many children, treatment is mainly supportive. There is no simple cure by medicine, and many patients need parenteral nutrition, careful line care, and sometimes intestinal transplant. [1][2][3]
Secretory diarrhea caused by mutation in EPCAM is most often called congenital tufting enteropathy. It is a very rare inherited bowel disease that usually starts in the newborn period or very early infancy. In this condition, the lining cells of the intestine do not join and work in the normal way. Because of that, the bowel cannot control water, salts, and nutrients well. The result is severe watery diarrhea, dehydration, poor weight gain, and often long-term feeding problems. This disease is usually passed in an autosomal recessive pattern, which means the child gets one altered gene copy from each parent. [1]
Another Names
Other names used for this disease include congenital tufting enteropathy, CTE, intestinal epithelial dysplasia, epithelial dysplasia of the intestine, and congenital diarrhea 5 with tufting enteropathy. These names describe the same main disorder, especially when it is caused by harmful changes in the EPCAM gene. [2]
Types
Type 1: Isolated or non-syndromic congenital tufting enteropathy. This is the form most strongly linked to EPCAM mutation. The main problem is severe intestinal disease with watery diarrhea, malabsorption, dehydration, and growth failure. [3]
Type 2: Syndromic tufting enteropathy. This form is more often linked with SPINT2 mutation, not EPCAM. It can include bowel disease together with findings such as choanal atresia, eye problems, or other body changes. It is listed here because doctors often compare it with the EPCAM form during diagnosis. [4]
Type 3: Mild to moderate disease course. Some children still have chronic diarrhea but later show partial improvement in feeding tolerance and may need less parenteral nutrition over time. [5]
Type 4: Severe intestinal failure form. Some infants have very high stool losses from early life, repeated dehydration, marked growth failure, and long-term dependence on parenteral nutrition, and a few may later need intestinal transplantation. [6]
Causes
The main true cause of this disorder is biallelic pathogenic mutation in EPCAM. The points below explain the genetic cause and the disease mechanisms that produce the diarrhea. [7]
1. Biallelic EPCAM mutation. The child has harmful changes in both copies of the EPCAM gene. This is the core cause of the disease. [8]
2. Loss of normal EpCAM protein. EPCAM mutations can stop the body from making enough working EpCAM protein in intestinal lining cells. [9]
3. Poor cell-to-cell adhesion. EpCAM helps epithelial cells stick together. When it is abnormal, the intestinal lining becomes unstable. [10]
4. Disordered intestinal epithelial development. Loss of EpCAM changes how intestinal cells grow and mature. [11]
5. Villous atrophy. The tiny finger-like absorptive structures become shortened or damaged, which worsens fluid and nutrient handling. [12]
6. Epithelial tuft formation. Crowded surface enterocytes form the classic “tufts” seen on biopsy, showing structural injury of the lining. [13]
7. Crypt hyperplasia. The deeper bowel glands may enlarge, showing abnormal tissue turnover and repair. [14]
8. Defective barrier function. The bowel wall becomes less able to control movement of water and salts. [15]
9. Abnormal ion and water transport. Because the lining is damaged, the intestine loses fluid into the stool more easily. [16]
10. Secretory diarrhea physiology. Many patients have diarrhea that continues even during fasting, which supports a secretory mechanism. [17]
11. Possible mixed secretory and osmotic loss. Some reports show that not every case is purely secretory, and some children may have mixed mechanisms. [18]
12. Malabsorption from epithelial injury. Damaged enterocytes absorb nutrients poorly, which increases stool output. [19]
13. Impaired enterocyte differentiation. The bowel cells may not mature into fully functional absorptive cells. [20]
14. Reduced absorptive surface area. Shortened villi mean less surface area to absorb water and food. [21]
15. Chronic congenital enteropathy. The disease starts because of an inherited bowel disorder present from birth, not because of an infection picked up later. [22]
16. Autosomal recessive inheritance. The disease appears when both gene copies are altered, which is why family history may be quiet in parents but present in siblings. [23]
17. Nonsense mutations in EPCAM. Some mutations create an early stop signal, which can severely reduce protein production. [24]
18. Missense mutations in EPCAM. Some mutations change one amino acid and disturb protein folding or function. [25]
19. Splice-site mutations in EPCAM. Some mutations disrupt the normal way RNA is processed, leading to defective protein. [26]
20. Founder mutations in some families or regions. In some populations, a shared ancestral EPCAM mutation can make the disorder appear more often in related families. [27]
Symptoms
1. Severe watery diarrhea. This is the main symptom. The stool is usually frequent, loose, and hard to control. [28]
2. Very early onset diarrhea. Symptoms often begin in the first days, weeks, or months of life. [29]
3. Diarrhea that persists during fasting. In many infants, diarrhea continues even when feeding is stopped, which points toward secretory loss. [30]
4. Dehydration. Ongoing loss of water in stool can quickly dry the body, especially in babies. [31]
5. Electrolyte imbalance. Important body salts can fall out of the normal range because of heavy stool losses. [32]
6. Failure to thrive. The child may not gain weight or length in the normal way. [33]
7. Poor weight gain. The body loses calories and absorbs nutrients badly, so weight gain can be very slow. [34]
8. Malnutrition. Long-term diarrhea and malabsorption may lead to low nutrition stores. [35]
9. Vomiting. Some affected infants also have repeated vomiting. [36]
10. Abdominal distension. The belly may look swollen or bloated. [37]
11. Feeding intolerance. Milk or feeds may be hard to tolerate because the bowel does not handle nutrients well. [38]
12. Irritability. Babies may become fussy because of dehydration, hunger, or belly discomfort. [39]
13. Weakness or low energy. Poor nutrition and dehydration can make the child look tired and weak. [40]
14. Dependence on parenteral nutrition. Many severe cases need nutrition through a vein for growth and survival. [41]
15. Long-term intestinal failure. In severe disease, the bowel cannot absorb enough fluid and nutrients to support normal life without major medical support. [42]
Diagnostic Tests
1. General physical examination. The doctor checks body condition, alertness, hydration, and overall sickness level. [43]
2. Weight measurement. Repeated weight checks help show poor growth or failure to thrive. [44]
3. Length or height measurement. This helps doctors see whether long-term nutrition and growth are being affected. [45]
4. Hydration assessment. Doctors look for dry mouth, reduced tears, sunken eyes, poor skin turgor, and other signs of dehydration. [46]
5. Nutrition assessment. This includes checking body fat, muscle mass, feeding history, and signs of vitamin or mineral deficiency. [47]
6. Stool volume observation. Measuring how much watery stool a child passes helps define the severity of the diarrhea. [48]
7. Fasting trial under medical supervision. Doctors may observe whether diarrhea continues when feeds are stopped briefly, which supports secretory diarrhea. [49]
8. Family history review. A history of similar illness, sibling deaths, or parental relatedness may suggest an inherited recessive disorder. [50]
9. Manual abdominal examination. The doctor gently feels the belly for distension, tenderness, or organ enlargement. [51]
10. Feeding response assessment. The care team watches how the gut responds to breast milk, formula, or elemental feeding. [52]
11. Serum electrolytes. Blood sodium, potassium, chloride, and bicarbonate help show fluid and salt loss. [53]
12. Blood gas testing. This can detect acid-base imbalance caused by severe diarrhea. [54]
13. Kidney function tests. Urea and creatinine help show the effect of dehydration on the kidneys. [55]
14. Complete blood count. This test checks for anemia, infection clues, and overall health status. [56]
15. Stool studies. Stool tests help exclude infectious or other common causes of chronic diarrhea. [57]
16. Endoscopy with small-intestinal biopsy. This is one of the most important tests because it allows doctors to see and sample the bowel lining directly. [58]
17. Histopathology of biopsy tissue. Under the microscope, doctors look for villous atrophy, crypt hyperplasia, and epithelial tufting. [59]
18. EPCAM genetic testing by targeted analysis. If the disease is strongly suspected, testing for EPCAM mutation can confirm the diagnosis. [60]
19. Sequencing methods such as Sanger or next-generation sequencing. These tests can find the exact disease-causing EPCAM variant. [61]
20. Imaging tests when needed. Imaging is not the main confirmatory tool, but abdominal ultrasound or other imaging may be used to look for complications or other causes of symptoms. [62]
Non-pharmacological treatments
1) Rapid dehydration correction. The first treatment is fast replacement of water and body salts under medical care. This is done because stool losses can be very high, especially in newborns. The purpose is to protect the brain, kidneys, heart, and blood flow. The mechanism is simple: fluids and electrolytes replace what is being lost in stool. [1][4]
2) Ongoing electrolyte replacement. Many children need repeated correction of sodium, potassium, bicarbonate, magnesium, and other electrolytes. The purpose is to prevent weakness, seizures, heart rhythm problems, and acid-base imbalance. The mechanism is restoration of normal blood chemistry while diarrhea continues. [1][5]
3) Parenteral nutrition (PN/TPN). This is the main life-saving treatment for severe EPCAM disease. Nutrition is given through a vein because the bowel cannot absorb enough fluid and nutrients. The purpose is growth, survival, and organ support. The mechanism is bypassing the damaged intestine and delivering calories, protein, fat, vitamins, and minerals directly into the bloodstream. [2][3][5]
4) Home parenteral nutrition. When the child becomes stable, PN may continue at home with specialist training. The purpose is long-term nutrition with better family life and fewer hospital days. The mechanism is safe daily or cyclic infusion using a central line and a trained caregiver team. [2][6]
5) Central venous catheter care. A sterile line-care routine is essential. The purpose is to reduce line infection, blockage, and loss of venous access. The mechanism is hand hygiene, sterile dressing changes, correct hub cleaning, and proper flushing protocols. [6][7]
6) Enteral feeding at the minimum tolerated level. Oral or tube feeds may worsen diarrhea, but many centers still give a small amount if tolerated. The purpose is to stimulate the gut, protect swallowing and feeding skills, and support some bowel adaptation. The mechanism is gentle exposure of the intestine to nutrients without forcing full feeding. [2][3]
7) Breast milk or specialized formula trials. Some infants may tolerate one type of feed better than another, though many still need PN. The purpose is to find the safest enteral option with the least stool loss. The mechanism is individualized feeding based on stool volume, hydration, and growth. [3][5]
8) Feeding by nasogastric or gastrostomy tube when needed. Tube feeding may help deliver small continuous feeds. The purpose is safer nutrition in infants who cannot drink enough or tire easily. The mechanism is slow controlled delivery that may be easier to tolerate than large oral feeds. [5][6]
9) Growth monitoring. Weight, length, head growth, and later body mass and puberty need regular review. The purpose is early detection of malnutrition or overfeeding. The mechanism is adjusting nutrition before severe growth failure happens. [5][8]
10) Micronutrient monitoring. Iron, zinc, copper, selenium, vitamins A, D, E, K, folate, and B12 can become abnormal. The purpose is to prevent anemia, bone disease, poor immunity, skin problems, and nerve problems. The mechanism is regular blood testing followed by individualized replacement. [5][6]
11) Liver surveillance during PN. Long-term PN can injure the liver. The purpose is to detect cholestasis and intestinal-failure associated liver disease early. The mechanism is regular bilirubin and liver enzyme testing, nutrition review, and lipid adjustment. [6][9]
12) Bone health follow-up. Chronic illness, poor absorption, and vitamin/mineral deficits may weaken bones. The purpose is to reduce fractures and rickets-like problems. The mechanism is checking vitamin D, calcium, phosphorus, and growth, then correcting deficiencies. [5][6]
13) Infection prevention around the line. Families are taught fever action plans, sterile supply handling, and early reporting. The purpose is prevention of bloodstream infection, which can be life-threatening. The mechanism is reducing bacteria entry into the catheter. [7][10]
14) Ethanol or lock-based catheter protocols in selected intestinal-failure programs. Some centers use catheter lock strategies to lower bloodstream infection risk. The purpose is fewer line infections and fewer hospital stays. The mechanism is reducing microbial growth inside the catheter lumen. This is center-specific and not for every child. [7][11]
15) Multidisciplinary intestinal failure care. These children do best with gastroenterology, surgery, nutrition, pharmacy, nursing, genetics, and social support together. The purpose is to manage a very complex disease safely. The mechanism is coordinated decision-making for fluids, feeds, line care, liver monitoring, and transplant timing. [5][6]
16) Genetic counseling for the family. EPCAM-related disease is inherited, usually in an autosomal recessive pattern. The purpose is to explain recurrence risk and future pregnancy options. The mechanism is family testing, counseling, and informed planning. [1][2]
17) Developmental support. Long illness, dehydration in infancy, and repeated hospital stays can delay development. The purpose is better motor, speech, learning, and social function. The mechanism is early referral to physiotherapy, occupational therapy, and speech support when needed. [6][12]
18) Psychological and caregiver support. Long-term PN and fear of infections create family stress. The purpose is to protect mental health and improve treatment adherence. The mechanism is counseling, social work, education, and respite support. [6][10]
19) Transplant assessment in severe intestinal failure. If PN causes severe liver disease, recurrent line sepsis, or loss of venous access, transplant review is needed. The purpose is survival and long-term quality of life when medical support is failing. The mechanism is replacement of the failing intestine, sometimes with liver if needed. [2][3][13]
20) Small bowel transplantation. This is the main accepted curative option for the intestinal disease itself, but it is not first-line care. The purpose is to free the child from irreversible intestinal failure when possible. The mechanism is replacing the diseased bowel with donor intestine. [2][3]
Drug treatments: what is evidence-based and what is not
For EPCAM-related secretory diarrhea, there are not 20 FDA-approved disease-specific drugs. Most medicines are used to support hydration, nutrition, symptoms, or PN complications, and some are off-label in this rare disorder. That is the honest evidence-based position. [2][3][5]
Teduglutide (Gattex). This GLP-2 analog is FDA-approved for adults and children aged 1 year and older with short bowel syndrome who depend on parenteral support, not specifically for EPCAM disease. In practice, it may be considered only in very selected intestinal-failure situations by specialists. The purpose is to improve absorption and reduce parenteral support in the right setting. The mechanism is stimulation of intestinal mucosal growth and function. Dose in the FDA label is 0.05 mg/kg once daily subcutaneously. Side effects include abdominal pain, vomiting, injection-site reactions, and risk of gastrointestinal obstruction or biliary/pancreatic problems. [14]
Octreotide (Sandostatin). Octreotide is not approved for congenital tufting enteropathy, but some clinicians may consider it off-label for severe secretory stool loss in very special cases. The purpose is to reduce secretion. The mechanism is somatostatin-like inhibition of several gastrointestinal hormones and secretions. The FDA label gives dosing for approved conditions such as VIPoma, not EPCAM diarrhea, so use in this disease must be specialist-led. Important side effects include gallstones, glucose changes, thyroid effects, and heart rhythm concerns. [15]
Omeprazole (Prilosec) or pantoprazole (Protonix). Acid suppression does not cure the disease, but it may help reflux, upper GI irritation, or related symptoms in some children. The purpose is comfort and protection from acid-related injury, not stopping the genetic diarrhea. The mechanism is proton pump inhibition in the stomach. Pediatric use appears in the FDA labels for approved acid-related conditions. Side effects may include headache, abdominal pain, diarrhea, and long-term concerns such as low magnesium or infections. [16][17]
Ondansetron (Zofran). This medicine may help nausea or vomiting that can happen during illness, line infections, or feeding intolerance. It does not treat the intestinal defect. The mechanism is 5-HT3 receptor blockade. Pediatric dosing and formulations are described in FDA labeling for approved nausea and vomiting indications. Side effects can include constipation, headache, and QT prolongation risk in some patients. [18]
Intralipid and other PN lipid components. Intravenous lipid emulsion is one of the most important “drug-like” nutrition products in these patients because many depend on PN for survival. The purpose is calories and essential fatty acids. The mechanism is direct intravenous nutrition when the gut cannot absorb enough. The FDA label notes pediatric PN use and warns that children are at risk for PN-associated liver disease during prolonged treatment. [19]
Ursodiol. Ursodiol is not a cure for EPCAM disease and is not FDA-approved for PN-associated cholestasis, but it is sometimes used off-label when cholestasis develops during long-term PN. The purpose is support of bile flow in selected patients. The mechanism is changing bile acid composition and improving bile movement. Evidence in PN-associated liver disease is limited, so specialist judgment is needed. [20][9]
Metronidazole or other antibiotics. Antibiotics are not routine treatment for EPCAM diarrhea itself. They are used only when there is a proven infection or a specific bacterial problem. The purpose is treatment of infection, not the genetic enteropathy. Metronidazole FDA labeling includes approved anti-infective uses, but not congenital tufting enteropathy. Side effects can include nausea, metallic taste, and neuropathy with longer exposure. [21]
Loperamide and other anti-diarrheal drugs. In rare severe congenital diarrheas, these are sometimes discussed, but evidence in EPCAM disease is weak and use in infants can be risky. They should never be started without a pediatric specialist. Their purpose would be stool reduction; the mechanism would be slower gut movement. Because benefit is uncertain and safety matters, they are not standard first-line disease treatment. [3][5]
Important truth about “immunity booster, regenerative, and stem cell drugs.” There is no established FDA-approved immune booster, regenerative drug, or stem cell drug that corrects EPCAM-related secretory diarrhea. Experimental research exists in pathogenesis and models, but standard care today remains nutrition support and transplant when needed. [3][5]
Dietary or molecular supplements
1) Zinc. Zinc may be needed because chronic diarrhea can increase losses. It supports skin, immunity, and healing. The mechanism is replacement of deficiency, not correction of the gene defect. [5][6]
2) Vitamin D. Vitamin D is often monitored because long illness and poor nutrition can harm bones. Its purpose is bone and immune support. The mechanism is calcium balance and bone mineralization. [5]
3) Calcium. Calcium may be needed for bone health, especially if vitamin D is low or growth is poor. The mechanism is support of bone and muscle function. [5]
4) Magnesium. Ongoing stool loss and nutrition problems can lower magnesium. Its purpose is nerve, muscle, and heart rhythm support. The mechanism is replacement of body loss. [5]
5) Iron. Iron may be needed if anemia develops. It supports red blood cell production. The mechanism is correction of iron deficiency. [5][6]
6) Folate. Folate supports blood formation and growth. The mechanism is replacement when intake or status is low. [5]
7) Vitamin B12. B12 is important for nerves and blood cells. It may be monitored especially in long-term intestinal disease or specialized nutrition plans. [5]
8) Fat-soluble vitamins A, E, and K. These may need careful monitoring in children on long-term PN or with poor intestinal handling of nutrients. They support vision, nerves, antioxidant defense, and blood clotting. [5][6]
9) Selenium and copper. These trace elements are small but important. They support antioxidant function, connective tissue, immunity, and blood health. The mechanism is micronutrient replacement when blood levels are low. [5]
10) Essential fatty acid support. This is usually provided through the PN lipid plan rather than a simple oral supplement. The purpose is growth, skin health, and cell function. The mechanism is replacement of nutrients the body cannot make. [19]
Surgeries or procedures
Central line placement is often needed so PN can be given safely over time. It is done because repeated peripheral IV access is not enough for long-term nutrition. [6]
Gastrostomy tube placement may be used when long-term feeding access is needed for slow enteral nutrition or medication delivery. It is done to support nutrition and reduce daily stress from repeated tube placement. [6]
Line revision or replacement may be necessary if the catheter is blocked, infected, damaged, or no longer safe. It is done to preserve dependable venous access for life-sustaining PN. [10]
Vascular access salvage or rehabilitation procedures may be needed in children who lose veins because of repeated lines, clots, or infections. It is done to maintain future access for PN. [10]
Small bowel transplant, sometimes combined with liver transplant, is considered when irreversible intestinal failure is complicated by severe PN-related liver disease, recurrent life-threatening sepsis, or loss of access sites. It is done as the definitive rescue option for selected severe patients. [2][13]
Prevention points
This disease itself cannot usually be prevented after birth because it is genetic, but complications can be reduced. Key steps are early diagnosis, fast dehydration treatment, strict line hygiene, regular electrolyte checks, growth tracking, liver monitoring, vaccination and infection awareness, specialist nutrition review, family training for home PN, and genetic counseling before future pregnancies. These steps do not remove the mutation, but they lower harm and improve survival. [1][5][6]
When to see doctors urgently
Go to urgent medical care right away for very low urine, dry mouth, sunken eyes, lethargy, fever, vomiting, blood in stool, fast breathing, seizures, trouble feeding, swelling, jaundice, line redness, line pain, or a sudden rise in stool amount. These signs can mean dehydration, infection, electrolyte crisis, liver disease, or catheter sepsis. In infants with EPCAM disease, delay can be dangerous. [2][6][10]
What to eat and what to avoid
Food must be individualized by a pediatric gastroenterology and nutrition team. In severe disease, the child may need little or no oral intake during unstable phases, while others may tolerate small continuous feeds. Often the practical advice is: use the specialist-recommended feed only, give small amounts if tolerated, watch stool output carefully, and avoid random diet changes. Avoid sugary drinks, unplanned herbal products, unsafe “immune boosters,” and any over-the-counter anti-diarrheal or supplement not approved by the child’s team. [2][3][5]
FAQs
What is the other name of this disease? It is commonly called congenital tufting enteropathy or intestinal epithelial dysplasia. [1][2]
Is it caused by infection? No. It is usually caused by inherited EPCAM mutations. [1]
Does breastfeeding cure it? No. Diarrhea usually continues despite breast milk or formula, although feeding plans still matter. [3][4]
Can medicines cure it? No standard medicine cures the EPCAM defect. Treatment is mostly supportive. [2][3]
Why is PN so important? Because the bowel often cannot absorb enough fluid and nutrition to support life and growth. [2][5]
Can some children improve over time? Yes. Some reports show that a subset gains better enteral tolerance over the years, but many remain PN dependent for a long time. [3][12]
Is transplant always needed? No. Transplant is reserved for selected severe cases, especially when PN complications become dangerous. [2][13]
Can the disease come back in another baby in the family? Yes, recurrence risk may exist because it is inherited. Genetic counseling is important. [1][2]
Are there immune booster drugs for it? No proven FDA-approved immune booster corrects this disease. [3]
Are there stem cell drugs for it? No established standard stem cell drug is approved for EPCAM secretory diarrhea. [3][5]
Can supplements replace PN? Usually no. Supplements may help deficiencies, but they do not replace full intravenous nutrition in severe disease. [5][19]
Why are line infections such a big problem? Because the central line is used often and bacteria can enter the bloodstream. [7][10]
Can anti-diarrheal medicines be used at home without advice? No. They may be ineffective or unsafe, especially in infants. [3][5]
What is the long-term outlook? The outlook depends on severity, PN complications, access to expert care, and whether transplant becomes necessary. Survival has improved with modern intestinal-failure programs. [6][12]
What is the most important action for families? Stay closely connected with a specialist intestinal-failure team and act quickly when dehydration, fever, or line problems appear. [6][10]
Disclaimer: Each person’s journey is unique, treatment plan, life style, food habit, hormonal condition, immune system, chronic disease condition, geological location, weather and previous medical history is also unique. So always seek the best advice from a qualified medical professional or health care provider before trying any treatments to ensure to find out the best plan for you. This guide is for general information and educational purposes only. Regular check-ups and awareness can help to manage and prevent complications associated with these diseases conditions. If you or someone are suffering from this disease condition bookmark this website or share with someone who might find it useful! Boost your knowledge and stay ahead in your health journey. We always try to ensure that the content is regularly updated to reflect the latest medical research and treatment options. Thank you for giving your valuable time to read the article.
The article is written by Team RxHarun and reviewed by the Rx Editorial Board Members
Last Updated: March 31, 2025.
