Asthma clinic screening points to more undiagnosed EoE in children
A study published online June 23 in The Journal of Allergy and Clinical Immunology: In Practice suggests eosinophilic esophagitis, or EoE, may be more common in pediatric asthma patients than clinicians have often recognized. Using a noninvasive symptom-screening approach in a tertiary care asthma and allergy clinic, researchers found enough previously unrecognized cases to estimate a notably higher prevalence than expected in this population.
The study does not say every child with asthma has EoE, nor does it argue that symptom surveys alone can diagnose the disease. What it does show is that screening inside a population already receiving asthma care can surface patients who might otherwise not be referred for gastrointestinal evaluation. For a condition in which delayed diagnosis can matter, that is a meaningful result.
What the researchers did
The analysis, led by researchers at the Medical College of Wisconsin, used responses to a modified Pediatric Eosinophilic Esophagitis Symptom Severity v2.0 survey. The survey was administered to 189 pediatric asthma patients between ages 7 and 17, or to parents of asthma patients ages 3 to 6, at a tertiary care asthma and allergy clinic.
The goal was straightforward: estimate how common EoE may be in this pediatric asthma population using noninvasive screening before referral and endoscopy. That design matters because EoE can be difficult to identify based on routine clinical impressions alone. Symptoms may overlap with other pediatric problems, and some children adapt their eating habits in ways that can obscure the severity of the condition.
The source report says 80.4% of participants screened positive on the modified symptom survey. Of those who screened positive, 47.4% were referred to gastroenterology. Among referred patients, 61.1% completed the referral. And among the 24 patients who underwent endoscopy, one-third were diagnosed with EoE.
Based on those findings, the investigators projected a total EoE prevalence of 8.0% in the asthma and allergy clinic population. When nonparticipants and patients lost to follow-up were accounted for, the projected prevalence rose to 13.9%.
Why the finding stands out
EoE is a chronic inflammatory disease of the esophagus characterized by eosinophil-driven inflammation. In children, it can present through feeding difficulties, abdominal symptoms, vomiting, or swallowing-related complaints. Left unrecognized, it can progress and contribute to structural narrowing and fibrostenotic complications over time.
The striking part of this study is not simply that some asthma patients also had EoE. It is the scale implied by the projected prevalence estimates. An 8.0% projected prevalence in this clinic population is already substantial. A 13.9% projection after accounting for nonparticipants and follow-up losses pushes the implication further: a meaningful subset of pediatric asthma patients in specialty care may also have undiagnosed esophageal disease.
That does not automatically translate to all clinical settings. The study was conducted at a tertiary care center, which often sees more complex or severe cases than community practices. Even so, the numbers raise an important clinical question. If EoE is being missed in a specialty asthma clinic, how often might it also be missed elsewhere when symptoms are attributed to other allergic or gastrointestinal issues?
The strongest symptom signal was vomiting
Among individual screening symptoms, the report says vomiting was the only one significantly associated with an eventual EoE diagnosis. That does not mean vomiting is sufficient to identify the condition on its own, and it does not imply that children without vomiting are at low risk. But it does offer a practical clue for clinicians working in allergy and asthma settings: some symptoms may deserve a lower threshold for GI referral than they currently receive.
The result is also a reminder that symptom interpretation in pediatric patients can be complicated. Younger children may struggle to describe dysphagia or food sticking, while caregivers may notice indirect signs such as meal avoidance, prolonged chewing, or recurrent vomiting. Structured screening can help standardize that first pass.
What the study may mean for practice
The authors conclude that screening in a pediatric asthma clinic identified a previously unrecognized high prevalence of EoE. They also argue that this approach may support earlier diagnosis, help prevent fibrostenotic complications, and reduce racial disparities.
Those are important claims, and they fit the clinical logic of earlier detection. If asthma clinics routinely serve children who already have allergic disease risk and repeated contact with specialists, they may offer a practical place to ask a short set of targeted EoE questions. That could create a referral pathway before symptoms worsen or before years pass without recognition.
Still, several cautions are important. A positive symptom screen is not a diagnosis. The referral completion rate in the study shows one real-world challenge: not every flagged patient reaches gastroenterology, and not every referred patient undergoes endoscopy. That means any screening program has to be paired with workable follow-up systems, family counseling, and access to specialty care if it is going to improve outcomes in practice.
There is also the issue of generalizability. Because this was a tertiary care clinic population, the prevalence estimates may not map directly onto general pediatric populations or all asthma cohorts. The projected higher figure that accounts for nonparticipants and losses to follow-up is informative, but it remains a projection rather than a direct measured diagnosis rate.
Why this matters beyond one clinic
Even with those limitations, the study adds to a growing clinical argument that allergic diseases should not always be treated in isolation. Asthma, food allergy, eczema, and EoE often sit within overlapping immune patterns. If a child is already inside the allergy care system, that setting may be one of the most efficient places to catch another inflammatory condition that would otherwise remain hidden.
That framing matters for families as much as for clinicians. A child who repeatedly vomits, avoids certain textures, eats unusually slowly, or seems to struggle with meals may not just be a picky eater or an asthma patient with unrelated symptoms. The point of screening is not to overdiagnose, but to avoid overlooking children who would benefit from further evaluation.
The study’s core message is measured but consequential: pediatric asthma clinics may be seeing more EoE than previously recognized, and a structured noninvasive screen can help bring those cases into view. If larger studies support the finding, the result could shape how allergy and pulmonary clinics think about symptom review, referral patterns, and earlier intervention.
This article is based on reporting by Medical Xpress. Read the original article.
Originally published on medicalxpress.com
