Microvillus Inclusion Disease: What It Is and How It Is Treated

Written by Medicover Team and Medically Reviewed by Dr Raosaheb Rathod , Gastroenterologists Medical

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Microvillus Inclusion Disease (MVID) is a rare inherited intestinal disorder that affects the cells lining the small intestine. The condition prevents normal absorption of nutrients and fluids, resulting in severe, life-threatening watery diarrhea that usually begins within the first few days of life. Early diagnosis, specialized nutritional support, and multidisciplinary care are essential to improve survival, growth, and quality of life.

What are the Types of Microvillus Inclusion Disease?

Microvillus Inclusion Disease is commonly classified according to the age at which symptoms begin.

Early-onset (Congenital) MVID: Symptoms develop within the first hours or days after birth and are usually severe.
Late-onset MVID: Symptoms appear later in infancy and may initially be less severe, although the disease remains serious.

What are the Symptoms of Microvillus Inclusion Disease?

Symptoms usually begin soon after birth and are primarily related to severe intestinal malabsorption and fluid loss.

Persistent watery diarrhea beginning shortly after birth.
Poor weight gain and failure to thrive.
Dehydration.
Chronic malnutrition.
Metabolic acidosis.
Edema due to protein loss and nutritional deficiencies.
Growth retardation.
Electrolyte imbalances.

What Causes Microvillus Inclusion Disease?

Microvillus Inclusion Disease is caused by inherited genetic mutations that disrupt the normal development and function of intestinal epithelial cells.

Mutations in the MYO5B gene (most common cause).
Less commonly, mutations in the STX3 or STXBP2 genes.
Autosomal recessive inheritance, requiring one altered gene from each parent.
Abnormal formation and function of intestinal microvilli leading to severe malabsorption.

When Should You See a Doctor for Microvillus Inclusion Disease?

Immediate medical evaluation is necessary if a newborn develops persistent diarrhea or signs of dehydration. Early diagnosis and treatment are essential to prevent life-threatening complications.

Persistent watery diarrhea beginning soon after birth.
Poor feeding or failure to gain weight.
Signs of dehydration such as dry mouth, reduced urination, or lethargy.
Persistent vomiting or severe electrolyte imbalance.
Known family history of Microvillus Inclusion Disease.
Parents who are known carriers of the disease-causing mutation.

Microvillus Inclusion Disease is typically managed by a multidisciplinary team including gastroenterologists, neonatologists, pediatric nutrition specialists, geneticists, pediatric surgeons, and specialized nursing staff.

Early specialist care improves nutritional status, growth, and long-term outcomes.

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How is Microvillus Inclusion Disease Diagnosed?

Diagnosis requires clinical evaluation along with specialized laboratory, pathological, and genetic investigations.

Clinical assessment of persistent neonatal diarrhea and growth failure.
Blood and stool tests to evaluate dehydration, electrolyte imbalances, acid-base status, and malabsorption.
Small intestinal biopsy demonstrating characteristic microvillus abnormalities.
Electron microscopy confirming microvillus inclusion bodies.
Genetic testing to identify mutations in the MYO5B, STX3, or STXBP2 genes.

What are the Treatment Options for Microvillus Inclusion Disease?

There is currently no definitive cure for MVID. Treatment focuses on maintaining nutrition, preventing complications, and improving long-term survival.

Total parenteral nutrition (TPN): Long-term intravenous nutrition to provide essential nutrients.
Specialized enteral feeding: When tolerated, carefully selected nutritional formulas may be introduced.
Fluid and electrolyte replacement: To prevent dehydration and metabolic complications.
Supportive medications: Management of diarrhea, infections, and nutritional deficiencies.
Intestinal transplantation: Considered for selected patients with severe disease or life-threatening complications related to long-term TPN.
Regular multidisciplinary follow-up: Ongoing nutritional, developmental, and medical monitoring.

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What are the Complications of Microvillus Inclusion Disease?

Without appropriate treatment, MVID can lead to severe complications affecting growth, nutrition, and survival.

Life-threatening dehydration.
Severe malnutrition and failure to thrive.
Electrolyte disturbances.
Growth and developmental delay.
Repeated bloodstream infections related to central venous catheters.
Liver disease associated with long-term parenteral nutrition.
Intestinal failure.

How Can Microvillus Inclusion Disease be Prevented?

Microvillus Inclusion Disease cannot be prevented after conception because it is an inherited genetic disorder. However, genetic counseling can help families understand and reduce recurrence risk.

Genetic counseling for couples with a family history of MVID.
Carrier testing for at-risk family members.
Prenatal or preimplantation genetic testing when appropriate.
Early newborn evaluation in families with previously affected children.

What are the Risk Factors for Microvillus Inclusion Disease?

Several inherited factors increase the likelihood of developing Microvillus Inclusion Disease.

Family history of MVID.
Parents who are carriers of pathogenic gene mutations.
Autosomal recessive inheritance.
Consanguineous marriage.
Previous child affected by MVID.

Frequently Asked Questions

1. Can my child live a normal life with MVID?

With ongoing medical care, nutritional support, and careful monitoring, many children with MVID can achieve a good quality of life and participate in everyday activities to the best extent possible.

2. Is MVID contagious?

No, Microvillus Inclusion Disease is not contagious. It is a rare inherited genetic disorder passed down through families and cannot be transmitted between individuals.

3. Will my child always need IV nutrition?

Long-term IV nutrition is often necessary, but some children may gradually tolerate small amounts of oral or tube feeds, depending on their condition and response to treatment.

4. Can MVID be detected during pregnancy?

Yes, if a family has a known genetic mutation linked to MVID, prenatal testing through genetic screening can help detect the condition before birth.

5. Is gene therapy available for MVID?

Gene therapy for MVID is currently under research and not yet available as a routine treatment, though advances in genetics may offer options in the future.

6. What specialist treats MVID?

Children with MVID are typically managed by a pediatric gastroenterologist who coordinates nutrition, treatment, and monitoring to manage symptoms effectively.