Food-Dependent Exercise-Induced Anaphylaxis on a Nontraditional Timeline.

Area of Science:

• Allergy and Immunology
• Clinical Medicine

Background:

• Food-dependent exercise-induced anaphylaxis (FDEIA) is a rare condition typically triggered by food ingestion followed by exercise.
• Exercise acts as a cofactor, lowering the threshold for an allergic reaction to specific food allergens.

Observation:

• A 14-year-old male experienced anaphylaxis after consuming a protein drink post-exercise.
• Symptoms included angioedema, pruritus, and cough, resolving with standard anaphylaxis treatment.
• Diagnostic workup, including skin prick testing, revealed sensitization to environmental aeroallergens, with potential cross-reactivity from drink ingredients.

Findings:

• This case presents a reversed sequence of FDEIA, with anaphylaxis occurring after food ingestion and prior exercise.
• Standard FDEIA diagnostic criteria were met, despite the atypical temporal sequence.

Implications:

• Clinicians should consider FDEIA even when anaphylaxis symptoms manifest after food ingestion and prior exercise.
• Recognizing atypical FDEIA presentations is crucial for accurate diagnosis and management, including patient counseling on allergen avoidance and exercise timing.