Gastroesophageal reflux (GER) is a common problem confronting physicians in
volved in the care of children and adults. With the association of GER with
asthma and chronic cough, physicians specializing in allergy/immunology re
quire information on the pathogenesis, diagnosis, and management of GER. Eo
sinophilic esophagitis or eosinophilic gastroenteritis are poorly understoo
d entities that may also lead to symptoms mimicking GER and are associated
in many cases with underlying hypersensitivity of unblown immunologic mecha
nism.