Together with cow’s milk and peanuts, hen’s egg is one
of the most common foods involved in children with IgEmediated
food hypersensitivities, and ovomucoid and
ovalbumin have been identified as 2 major allergens.1 It is
also commonly observed that most children tolerate egg
again after an avoidance diet.2,3 These patients have follow-up
challenges, either by double-blind, placebo-controlled
food challenges with lyophilized egg powder or by
open challenges with cooked eggs (eg, hard-boiled eggs,
scrambled eggs, French toast). We report 2 patients with
negative follow-up food challenges to cooked eggs who
had subsequently severe allergic reactions to raw egg