OBJECTIVE: To report a case of Frey syndrome in a child, whose malar flushing has been initially associated with food allergy. CASE DESCRIPTION: One year-old child referred to the food allergy out-patient clinic. The patient has been presenting unilateral facial flushing localized in the auriculotemporal nerve pathway after the ingestion of fruits and vegetables. At this time, these foods were excluded from patient's diet due to the clinical diagnosis of food allergy. The child was born by vaginal delivery and had obstetrical trauma. COMMENTS: The diagnosis of Frey syndrome (auriculotemporal syndrome or gustatory sweating) was established considering the clinical characteristic of facial flushing triggered after ingestion of foods and the exclusion of food allergy diagnosis. The damage to the auriculotemporal nerve caused by obstetrical trauma may misdirect the regeneration of the nerve fibers that results in facial flushing with gustatory stimulation. The present case points out to the importance of appropriate differential diagnosis of food allergy in order to avoid unnecessary restrictive diets. In patients with malar flushing in the auriculotemporal nerve pathway after food ingestion the possibility of Frey syndrome should be considered.
Frey syndrome; auriculotemporal syndrome; gustative sweating; food hypersensitivity; child
