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Evaluating the child with chronic diarrhea
1University of Calgary, Alberta, Canada.
Insights
Chronic diarrhea in children has various causes depending on age, from infections to intolerances and inflammatory conditions. Stool characteristics and associated symptoms help pinpoint the underlying diagnosis for effective treatment.
Area of Science:
- Pediatrics
- Gastroenterology
- Clinical Medicine
Background:
- Chronic diarrhea is a common pediatric concern with diverse etiologies.
- Differential diagnosis varies significantly based on patient age and clinical presentation.
Purpose of the Study:
- To outline the diagnostic approach to chronic diarrhea in children.
- To correlate specific clinical features and stool characteristics with potential underlying causes.
Main Methods:
- Review of established diagnostic criteria and clinical indicators for pediatric chronic diarrhea.
- Correlation of symptoms, stool analysis, and age-specific conditions.
Main Results:
- Infants (<3 months) may have disaccharidase deficiency, protein intolerance, cystic fibrosis, or immunodeficiency.
- Older children (3-18 years) may present with celiac disease, lactose intolerance, or inflammatory bowel disease.
- Gastrointestinal infections are a universal cause; stool findings (e.g., neutrophils, eosinophils) and weight loss guide diagnosis.
Conclusions:
- Age-specific evaluation is crucial for diagnosing chronic diarrhea in children.
- Clinical presentation and stool analysis are key to identifying causes ranging from infections to malabsorption and inflammatory conditions.
- Chronic nonspecific diarrhea of childhood is a diagnosis of exclusion in thriving children.
Abstract:
The occurrence of chronic diarrhea in infants younger than three months suggests disaccharidase deficiency, cow's milk or soy protein intolerance, cystic fibrosis or an immunodeficiency state, while chronic diarrhea in children three to 18 years of age suggests celiac disease, late-onset primary lactose deficiency and inflammatory bowel disease. Gastrointestinal infection is the most common cause of chronic diarrhea in children of all ages. Diarrhea that develops after the introduction of cow's milk, cereals and fruits suggests an enzyme deficiency or protein intolerance. Watery, explosive stools suggest sugar intolerance, and foul-smelling, greasy, bulky stools suggest fat malabsorption. Marked weight loss suggests malabsorption, inflammatory bowel disease, hyperthyroidism or malignancy. The presence of neutrophils or red blood cells in the stool indicates bacterial gastroenteritis or inflammatory bowel disease, while the presence of eosinophils suggests protein intolerance or parasitic infestation. A toddler who is thriving and cheerful despite having diarrhea may have chronic nonspecific diarrhea of childhood.