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PostPosted: Mon Mar 03, 2014 7:06 pm 

Joined: Thu Dec 20, 2007 7:23 pm
Posts: 1070
Location: Kingston
Children Who Outgrow Allergies May Have Severe Recurrences

Spergel is also director of CHOP’s Center for Pediatric Eosinophilic Disorders, one of the top programs in the nation for EoE treatment.

His research was presented today at the annual meeting of the American Academy of Allergy, Asthma & Immunology (AAAAI) in San Diego by Solrun Melkorka Maggadottir, MD, also of CHOP.

EoE involves swelling and inflammation of the esophagus, along with excessive levels of immune cells called eosinophils. EoE is known to cause weight loss, vomiting, heartburn and difficulty swallowing. This painful disorder affects people in any age group, but is usually first discovered in children with feeding difficulties.

Spergel and colleagues compared EoE with IgE-mediated food allergy, a more familiar type of food allergy that occurs when antibodies mount an exaggerated immune response against proteins in particular foods, such as nuts, eggs or milk. These foods can trigger a host of problems, including vomiting, hives and other skin reactions.

For the study, the team performed a retrospective analysis of 1,375 children seen at CHOP for EoE between 2000 and 2012. Of those, 425 could be shown to have a definite food causing their disorder – most commonly milk, egg, soy, or wheat. Of these children, 17 had gone on to develop EoE to a food after outgrowing IgE-mediated allergy to that same food.

“The pattern we found in those 17 patients suggests that the two types of food allergy have distinct pathophysiologies—they operate by different mechanisms and cause different functional changes,” said Spergel. “However, this pattern also raises the possibility that prior IgE-mediated food allergy may predispose a patient to developing EoE to the same food.”

About 10 percent of patients who undergo desensitization therapy for IgE-mediated food allergies go on to develop EoE to the same food, noted Spergel.

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