How is celiac diagnosed?
A. If your child has symptoms or growth problems, your pediatrician or gastroenterologist can give him a blood test. Although false-negative results are common in babies and toddlers, a school-age child with a negative test probably doesn't have celiac. If the test is positive -- or your doctor thinks it may be a false negative -- your child will need a biopsy of his small intestine to see whether it's been damaged by gluten. A biopsy is an outpatient procedure performed in the hospital under general anesthesia; the doctor passes a small tube through a child's throat into his intestine.