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Paeds Casesallergy-and-immunology

Paeds Cases · allergy-and-immunology

Allergic disease in children: integrated approach: Case

Clinical long case of a school-age child with multisystem atopic disease (severe eczema, peanut allergy with prior anaphylaxis, poorly controlled asthma and allergic rhinitis), covering IgE versus non-IgE classification, the shared type-2 mechanism and atopic march, the anaphylaxis and adrenaline-autoinjector decision, early-introduction prevention for siblings, the skin-barrier Horimukai 2014 versus BEEP nuance, and the shared decision around oral immunotherapy.

paediatric long case4 min readVerification in progress

Target exams

RACP DCEMRCPCH ClinicalRCPSC Pediatrics
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Target exams

RACP DCEMRCPCH ClinicalRCPSC Pediatrics
Prompt
A 12-year-old boy is reviewed in the integrated allergy clinic for the first time. He developed atopic dermatitis at 4 months that has persisted and is currently widespread and sleep-disrupting. He had an anaphylactic reaction to peanut at 3 years requiring intramuscular adrenaline, and a skin-prick test last year showed a 9 mm peanut wheal and specific IgE to Ara h 2. Over the last two years he has had recurrent wheeze and uses a salbutamol inhaler on most days, with two courses of oral corticosteroid in the last year. He also has perennial nasal congestion and itchy eyes. His mother asks whether his peanut allergy will ever resolve, whether he needs to keep carrying the EpiPen, and whether anything can be done about his asthma and skin together. He is reluctant to carry the autoinjector at school.

This boy has multisystem atopic disease spanning all four compartments: persistent severe eczema, IgE-mediated peanut allergy with prior anaphylaxis, poorly controlled asthma, and perennial allergic rhinitis. He illustrates the atopic march reaching adolescence, and the combination of food allergy with undertreated asthma in a teenager who is reluctant to carry his autoinjector places him squarely in the highest-risk group for fatal anaphylaxis. The clinical task is to build one coordinated plan that treats the tendency, optimises each organ, secures the food-allergy safety net, and engages an adolescent who is at the developmental stage where risk-taking peaks. [5][6]

Clinical findings

The key findings are the four-organ pattern and the risk markers within it. The eczema is widespread and sleep-disrupting, indicating uncontrolled disease and a high sensitisation load. The peanut history is the defining risk: a documented anaphylaxis at three years, a persistent large skin-prick wheal, and sensitisation to Ara h 2, the stable storage protein that predicts systemic rather than cross-reactive, pollen-related allergy. The asthma is poorly controlled, with frequent short-acting bronchodilator use and two oral-steroid courses in a year, and poor asthma control in a food-allergic child is the single clearest predictor of fatal food anaphylaxis because the anaphylactic bronchospasm compounds an already twitchy airway. [6]

The candidate should articulate the problem representation: a 12-year-old with multisystem atopic disease and a prior peanut anaphylaxis, with poorly controlled asthma and adolescent barriers to autoinjector adherence, requiring an integrated plan that prioritises anaphylaxis safety, asthma control, skin control, and adolescent engagement. The candidate should also name the risk explicitly: this is a prototypical fatality-risk profile. [4]

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References7ShowHide
  1. [1]Du Toit G, Roberts G, Sayre PH, et al. Randomized trial of peanut consumption in infants at risk for peanut allergy N Engl J Med, 2015.PMID 25705822
  2. [2]Togias A, Cooper SF, Acebal ML, et al. Addendum guidelines for the prevention of peanut allergy in the United States: Report of the NIAID-sponsored expert panel J Allergy Clin Immunol, 2017.PMID 28065278
  3. [3]Peters RL, Allen KJ, Dharmage SC, et al. Natural history of peanut allergy and predictors of resolution in the first 4 years of life: A population-based assessment J Allergy Clin Immunol, 2015.PMID 25725989
  4. [4]Sampson HA, Muñoz-Furlong A, Campbell RL, et al. Second symposium on the definition and management of anaphylaxis: summary report Ann Emerg Med, 2006.PMID 16546624
  5. [5]Spergel JM The atopic march: Where we are going? Can we change it? Ann Allergy Asthma Immunol, 2021.PMID 34479727
  6. [6]Turner PJ, Jerschow E, Umasunthar T, et al. Fatal Anaphylaxis: Mortality Rate and Risk Factors J Allergy Clin Immunol Pract, 2017.PMID 28888247
  7. [7]Chu DK, Wood RA, French S, et al. Oral immunotherapy for peanut allergy (PACE): a systematic review and meta-analysis of efficacy and safety Lancet, 2019.PMID 31030987
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