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Autoimmune Enteropathy (AIE)
Autoimmune enteropathy is a rare, severe disorder where the body's immune system mistakenly attacks the lining of the intestines, leading to chronic diarrhea, malabsorption, and failure to thrive
Prevalence
Exact prevalence unknown
100–200
US Estimated
150–300
Europe Estimated
Age of Onset
Infancy
ICD-10
K52.89
Inheritance Pattern
Most cases are sporadic
5 Facts you should know
FACT
Autoimmune enteropathy (AIE) is a rare cause of intractable diarrhea, most often presenting in infants and young children, though cases in adults have been reported
FACT
It is characterized by small intestinal villous atrophy, crypt hyperplasia, and intraepithelial lymphocytosis, resembling celiac disease but unresponsive to a gluten-free diet
FACT
AIE is associated with circulating anti-enterocyte or anti-goblet cell antibodies, which can support diagnosis but are not always present
FACT
Many patients have additional autoimmune manifestations, such as type 1 diabetes, thyroiditis, or immune dysregulation syndromes like IPEX (FOXP3 mutations)
FACT
Management often requires immunosuppressive therapy (e.g., corticosteroids, calcineurin inhibitors, biologics), along with nutritional support to address severe malabsorption
Interest over time
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Common signs & symptoms
Severe chronic diarrhea
Malabsorption and failure to thrive
Dependence on parenteral nutrition in some patients
Villous atrophy
Associated autoimmune disorders
Current treatments
Immunosuppressive therapy
(corticosteroids, tacrolimus, cyclosporine, sirolimus, azathioprine)
Biologic therapy
(rituximab, infliximab in refractory cases)
Parenteral nutrition
when severe malabsorption is present