Chronic diarrhea in children.
Among the many causes of chronic diarrhea in children are food, the most common; inflammation; enzyme deficiencies; metabolic, anatomic, and physiologic abnormalities; and endocrine disorders. The first step in management is to estimate fluid losses and treat dehydration greater than 5%. Workup should include a careful diet history, physical examination, examination of stools and urine, and usually a sweat test. Treatment should be directed to the underlying disease.