IGHE and peanut allergic reaction: However, some patients with PA did not have detectable IgE to Ara h 2, and conversely, some PS patients had Ara h 2–specific IgE levels greater than the cutoffs that have been identified as being associated with a high probability of clinical peanut allergy.3,24,25 Various examples of patients with PA and PS patients with the same IgE sensitization pattern to peanut allergens but with opposite clinical outcomes could be found in our cohort.